"Drum to Disc" Conversion Threads,...

[lolife99]

EDIT: (as of 1-23-11)
We're now using this thread to add FAQ quality links for "Drum to Disc Conversion" only threads.
Eventually, there might be associated topics added.


The first 100 threads, (as of today) in the "Suspension Section",... using the seach, "drum to disc":
These threads only go back to July 2009.

http://67-72chevytrucks.com/vboard/s...archid=2098205

http://67-72chevytrucks.com/vboard/s...5&pp=25&page=2

http://67-72chevytrucks.com/vboard/s...5&pp=25&page=3

http://67-72chevytrucks.com/vboard/s...5&pp=25&page=4

Thses are hand picked threads form the 67-72 message board:
These threads only go back to Aug. 2010.

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

http://67-72chevytrucks.com/vboard/s...ight=drum+disc

Also,... not included were any rear disc questions, brake booster/mastercylinder questions, or proportioning valve questions.

So,... if a special thread/sticky/area was set up,... would anyone go there and read?
Or would everyone rather ask their specific questions and have people post in their particular thread?

This question gets asked daily in the 60-66 section, the 67-72 section,... and even rear disc questions in the 73-87 section.

Just trying to get input, on a way to link all these threads.

[lolife99]

None of this includes problems with 65-70 crossmembers with the steel brake lines on the back of the crossmember vs the 71-72 with the steel lines on the front side of the crossmember vs the 73-87 that have the steel lines exiting a hole in the frame. (not the crossmember)

Plus the different routings of the steel brake lines. 67-70, 71-72, 73-87.

Or 73-78 calipers that require a 7/16-20 banjo bolt vs the 79-87 that require a 10mm metric banjo bolt.

Then there's the master cylinder and proportioning valve questions.

[lolife99]

I'm not sure what GM had on there mind when they went to disc brakes in 1971.
In 1972 the trucks had the same parts.
BUT,... in the '73 model year they changed things for some unknown reason.

I understand going to rubber bushed a-arms.
But why did they change the upper balljoint and not the lower ball joint?
Why did all the tie rods change?
Did the centerlink and all the associated tie rods of the 71-72 truck fail?
No.
New supplier of parts? Who knows.

So now,... the 71-72 parts are really the "odd ball" disc brake parts.
Most auto parts stores don't stock the "2-year only" parts.
The 73-87 parts are almost always in stock.

So if you could eliminate the all 71-72 parts from the mix,... it would make things easier.
But, since the 71-72 trucks are my personal favorites,... I'm glad you can still get restoration parts for these trucks' suspension and brake systems.

The most important thing I would like to get from this thread,... is to find "FAQ worthy" threads that will help us all.

Any one have other suggestions to make this topic easier to understand?

[N2TRUX]

60-62 truck with:
63-70 crossmember
71-72 crossmember
73-87 crossmember

63-70 truck with:
63-70 crossmember
71-72 crossmember
73-87 crossmember

71-72 truck with:
71-72 crossmember
73-87 crossmember

60-72 trucks with "unknown" crossmember swap?
This is where it's hard to determine the correct parts needed.


If you took that and used it as a start page, then add links to a second page for each sub section, it might flow out. Your main page would be FAQ and secondary pages for comments, useful links, etc.

[N2TRUX]

63-70 truck with:
63-70 Crossmember Installed:
1) There are many advantage to leaving your 63-70 crossmember in place to add disc brakes.

2) 63-70 truck owners can now purchase "year specific" standard and drop spindles, from many aftermarket suspension vendors.
* No need to change ball joints.
* No need to change tie rod ends.
* These new "conversion disc brake spindles" are a true "bolt-on" mod to add disc brakes to your truck.

3) The 63-70 a-arms can also be used with any other spindle (71-72 or 73-87) with a simple ball joint change.
* The upper and lower ball joints and outer tie rods must match the correct year of spindle you choose.

4) You will need a "conversion" rubber brake hose to connect your disc brake caliper to your existing steel brake line.


Links:
*http://www.classicperform.com/discdrop.htm
*http://www.earlyclassic.com/Tech.asp...20That%20Truck
*http://www.customclassictrucks.com/t...all/index.html

63-70 Truck with:
71-72 Crossmember Installed:
1) Your truck's donor 71-72 crossmember came from the factory with disc brakes.

2) "Year Specific" 71-72 drop spindles are readily available.

3) All spindles and rotors are the HD version (1-1/4" wide).
* This will require matching HD calipers.

4) Steering linkage contains 11/16" diameter tie rods.
* Inner Tie rods are LH thread.
* Outer Tie rods are RH thread.
* Inner Tie Rods are a "2-year only" tie rods. (71-72 only)
* Outer Tie Rods are a "2-year only" tie rods. (71-72 only)

5) Steering Linkage:
* All 71-72 oem linkage will work with 71-72 "year specific" drop spindles.

6) A-arms have steel bushings.

7) 71-72 crossmembers have the steel brake line connect the rubber brake line on the front side of the crossmember.
* Steel reproduction brake line sets are specific to the 71-72 design.

8) Rubber brake hoses are a "2-year only" item. (71-72)

9) 6-lug aftermarket rotors are now readily available if you decide you want to keep your 6-lug style wheels on your 60-62 truck.
* Be aware that the oem 15x6.5 steel 6-lug wheels will not clear your new disc brake conversion. You will need to use a set of steel wheels found on the later 73-87 4x4 trucks.

63-70 Truck with:
71-72 Crossmember Not Yet Installed:
* The entire crossmember can be swapped,... or,... you can just swap all components (including steering linkage) from the a-arms out.
1) Your truck's donor 71-72 crossmember came from the factory with disc brakes.

2) 63-70 steering linkage use a different centerlink and tie rods, than the 71-72 crossmember you will be installing.

3) 63-70 tie rods are 5/8" diameter,... 71-72 tie rods are 11/16" diameter (with the opposite thread direction).
* 63-70 inner tie rods are RH thread vs. 71-72 inner tie rods (that are LH thread).
* 63-70 outer tie rods are LH thread vs 71-72 outer tie rods (that are RH thread).
* It's easiest to just use all of the 71-72 Steering linkage.
* You can also use all of the 73-87 steering linkage, but you will have to change the outer tie rods to the 71-72 version to match the 71-72 spindle.

4) If you must use your 63-70 centerlink and inner tie rods:
* You will be require to use a "conversion" tie rod sleeve to connect the 63-70 5/8" diameter tie rod,... to the 71-72 11/16" diameter outer tie rod.
* Here is the problem: The 63-70 inner tie rod is RH thread. The 71-72 outer tie rod is also RH thread.
* To correct this,... you must use a 63-70 outer tie rod in the inner location.
* (The 63-70 outer tie rod is LH thread)

5) If you just want to add 71-72 spindles to your existing 63-70 a-arms,... you will need to change the 63-70 upper and lower ball joint to 71-72 upper and lower ball joints.
* The outer tie rod will have to be a 71-72 outer tie rod also. (see Step #4 above)

6) Rubber brake hoses:
* You must change to a disc brake style hose.
* Early Classic Enterprises, and other suspension vendors, make a "conversion" brake hose that will connect the disc brake caliper, to the original 63-70 brake hose steel line location.
* 71-72 hoses is another option. (but I haven't personally confirmed if the steel line connection is the correct size).
* Another option is to use 73-87 hoses, (cheaper to purchase), but they are much longer, and also may need fitting adapters.
* Aftermarket steel braided hoses and AN fittings is another option.

Links:
*http://67-72chevytrucks.com/vboard/s...+brake+install.
* Hotchkis Suspension:
http://www.truckinweb.com/tech/suspe...dup/index.html


63-70 Truck with:
73-87 Crossmember Installed:
1) Your trucks 73-87 donor crossmember came from the factory with disc brakes.
* Using the 73-87 crossmember allows for upgrading to 73-87 style rubber bushed a-arms.
* Most replacement parts are more affordable than the "2-year" specific 71-72 model trucks.
* Plus most auto parts stores keep these parts in stock.

2) Drop spindles are readily available,... but there are two versions that must match the two rotor versions below:

3) Rotors: There are two different widths of rotors available on the 73-87 model trucks.
3.1) HD or Heavy Duty rotors: (1-1/4" wide version) available from 73-87
* These will require matching HD bearings and calipers.
3.2) LD or Light Duty rotors: (1" wide version) available from 81-87.
* These will require matching LD bearings and calipers.

4) Steering linkage contains 11/16" diameter tie rods.
* Inner Tie rods are LH thread.
* Outer Tie rods are RH thread.
* Inner Tie Rods are 73-87 specific
* Outer Tie Rods are 73-87 specific

5) All 73-87 oem steering linkage will work with your 73-87 spindles.

6) The 1/2 ton a-arms have rubber bushed cross shafts
* (compared to the steel bushings of the 71-72 a-arms)

7) 73-87 crossmembers have the steel brake line connect the rubber brake line through a hole originally drilled in the 73-87 frame rail.
* Using these crossmembers in the older trucks will require you to fabricate some or all of your steel brake lines.
* (63-70 brake lines connect on the rear side of the crossmember)
* (71-72 brake lines connect on the front side of the crossmember)
* Steel reproduction brake line sets are specific to the 73-87 design with their proportioning valve mounted on a crossmember in front of the engine opposed to hanging below the master cylinder.

8) 73-87 rubber brake hoses are much longer than either the 63-70 drum brake hose or the 71-72 disc brake hose.

9) 6-lug aftermarket rotors are now readily available if you decide you want to keep your 6-lug style wheels.
* To use the 6-lug rotors you must have the 73-87 HD spindles,... since all aftermarket 6-lug rotors are only available in the 1-1/4" wide version.
* Be aware that the oem 15x6.5 steel 6-lug wheels will not clear your new disc brake conversion. You will need to use a set of steel wheels found on the later 73-87 4x4 trucks.

63-70 Truck with:
73-87 Crossmember Not Yet Installed:
1) This swap is almost a direct bolt in, with just a few holes to drill/elongate.

2) The preferred method is to use all of the 73-87 steering linkage:
* This includes the centerlink, inner and outer tie rods, idler arm and steering box. (A great way to gain P/S)

3) If you must use the 63-70 steering components, you will need to change the tie rods:
* The 63-70 inner and outer tie rods are a smaller diameter (5/8") vs. the 73-87 tie rods diameter (11/16").
* The 63-70 tie rods are also the opposite thread direction of the 73-87 tie rods.
* 63-70 inner is RH thread vs. 73-87 inner which is LH thread.
* 63-70 outer is LH thread vs. 73-87 outer which is RH thread.
3.1) So to connect the 73-87 spindle to the 63-70 steering centerlink you must:
* 63-70 outer tie rod (LH thread) in the inner location.
* connect that to a tie rod "conversion sleeve" that is sold by many aftermarket vendors.
* use a 73-87 outer (RH thread) to connect to your 73-87 spindle.
* It's much simpler using all of the 73-87 steering components.

4) Connecting the 73-87 rubber brake lines to the 63-70 steel lines, may require steel line fabrication, or brass "inverted flare" adapters.

5) You can also just swap all the components from the a-arms out and leave your original 63-70 crossmember in place.





Links:
*http://67-72chevytrucks.com/vboard/s...+brake+install
*http://www.67-72chevytrucks.com/vboa...d.php?t=357610

*http://www.classictrucks.com/tech/05...ing/index.html

CPP Modular Spindle Install
*http://www.classicperform.com/tech_a....05.09-web.pdf

*16" WILWOOD Install:http://www.customclassictrucks.com/t...10s/index.html

[N2TRUX]

71-72 truck with:
71-72 Crossmember Installed:
1) Your truck's crossmember came from the factory with disc brakes.

2) "Year Specific" 71-72 drop spindles are readily available.

3) All rotors are the HD version (1-1/4" wide).
* This will require matching HD calipers.

4) Steering linkage contains 11/16" diameter tie rods.
* Inner Tie rods are LH thread.
* Outer Tie rods are RH thread.
* Inner Tie Rods are a "2-year only" tie rod. (71-72 only)
* Outer Tie Rods are a "2-year only" tie rod. (71-72 only)

5) Steering Linkage:
* All 71-72 oem linkage will work with 71-72 "year specific" drop spindles.

6) A-arms have steel bushings.
* (compared to the rubber bushings of the 73-87 a-arms)

7) 71-72 crossmembers have the steel brake line connect the rubber brake line on the front side of the crossmember.
* 63-70 brake lines connect on the rear side of the crossmember.
* Steel reproduction brake line sets are specific to the 71-72 design.

8) Rubber brake hoses are a "2-year only" item. (71-72)

Links:
*Hotchkis Suspension:
http://www.truckinweb.com/tech/suspe...dup/index.html

71-72 Truck with:
73-87 Crossmember Installed:
1) Your 71-72 trucks already have disc brakes.
* Using the 73-87 crossmember allows for upgrading to 73-87 style rubber bushed a-arms.
* Most replacement parts are more affordable than the "2-year" specific 71-72 model trucks.
* Plus most auto parts stores keep these parts in stock.

2) Drop spindles are readily available,... but there are two versions that must match the two rotor versions below:

3) Rotors: There are two different widths of rotors available on the 73-87 model trucks.
3.1) HD or Heavy Duty rotors: (1-1/4" wide version) available from 73-87
* These will require matching HD bearings and calipers.
3.2) LD or Light Duty rotors: (1" wide version) available from 81-87.
* These will require matching LD bearings and calipers.

4) Ball joints:
* 73-87 Uppers are a different.
* 73-87 lowers are the same.

5) Steering linkage contains 11/16" diameter tie rods.
* Inner Tie rods are LH thread.
* Outer Tie rods are RH thread.
* Inner Tie Rods are 73-87 specific (and different from the 71-72 tie rods).
* Outer Tie Rods are 73-87 specific (and different from the 71-72 tie rods).

6) All 73-87 oem steering linkage will work with your 73-87 spindles.

7) Steering Linkage:
* If you swap out your crossmember, it's easiest to just use the 73-87 Steering linkage.
* You can use all of your 71-72 steering linkage, but you will have to change the outer tie rods to the 73-87 version.

8) The 1/2 ton a-arms have rubber bushed cross shafts
* (compared to the steel bushings of the 71-72 a-arms)

9)73-87 crossmembers have the steel brake line connect the rubber brake line through a hole originally drilled in the 73-87 frame rail.
* Using these crossmembers in the older trucks will require you to fabricate some or all of your steel brake lines.
* (63-70 brake lines connect on the rear side of the crossmember)
* (71-72 brake lines connect on the front side of the crossmember)
* Steel reproduction brake line sets are specific to the 73-87 design with their proportioning valve mounted on a crossmember in front of the engine opposed to hanging below the master cylinder.

10) 73-87 rubber brake hoses are much longer than either the 63-70 drum brake hose or the 71-72 disc brake hose.

71-72 Truck with:
73-87 Crossmember Not Yet Installed:
1) This swap is almost a direct bolt in, with just a few holes to drill/elongate.

2) The preferred method is to swap all of the steering linkage:
* This includes the centerlink, inner and outer tie rods, idler arm and steering box. (A great way to gain P/S)

3) If you must use the 71-72 steering components, you will need to change the 71-72 outer tie rod to the larger 73-87 version.

4) Connecting the 73-87 rubber brake lines to the 71-72 steel lines, may require steel line fabrication, or brass "inverted flare" adapters.

5) You can also just swap all the components from the a-arms out and leave your original 71-72 crossmember in place.




Links:
http://www.classictrucks.com/tech/05...ing/index.html

CPP Modular Spindle Installhttp://www.classicperform.com/tech_a....05.09-web.pdf

16" WILWOOD Install:http://www.customclassictrucks.com/t...10s/index.html

[N2TRUX]

60-72 Trucks with "unknown" Crossmember Swap?
This is where it's hard to determine the correct parts needed.

Disc Brake Spindle:
*60-70 (Aftermarket Conversion Spindles)
*71-72 (oem or drop)
*73-87 (oem or drop)

C10
Grouped by Differences:
*60-62
*63-70
*71-72
*73-87 (HD 1.25" wide rotors)
*81-87 (LD 1.00" wide rotors)
**Some 81-87 trucks also had the HD rotors**
** All Aftermarket 6-lug "Conversion Rotors Are the HD 1.25" wide version**
C20
*71-87

Rotors:
*71-72 (1.25" wide)
*73-87 (HD 1.25" wide rotors)
*81-87 (LD 1.00" wide rotors)
**Some 81-87 trucks also had the HD rotors**
** All Aftermarket 6-lug "Conversion Rotors Are the HD 1.25" wide version**

Calipers:
*71-72 (1.25" wide)
*73-87 (HD 1.25" wide rotors)
*81-87 (LD 1.00" wide rotors)
**Some 81-87 trucks also had the HD rotors**
** All Aftermarket 6-lug "Conversion Rotors Are the HD 1.25" wide version**

Upper Ball Joint:
Grouped by Differences:
C10
*60-62
*63-70
*71-72
*73-87
C20
*71-87

Lower Ball Joint:
Grouped by Differences:
C10
*60-62
*63-70
*71-87
C20
*71-87

Control Arm Upper Cross Shafts:
Grouped by Differences:
C10
*60-62
*63-72
*73-87
C20
*63-87

Control Arm Lower Cross Shafts:
Grouped by Differences:
C10
*60-62
*63-72
*73-87
C20
*67-86


Inner Tie Rods:
Grouped by Differences:
C10
*60-62
*63-64
*65-70
*71-72
*73-87
C20
*60-64 (drivers side)
*60-64 (pass. side)
*65-70
*71-87

Outer Tie Rods:
Grouped by Differences:
C10
*60-64
*65-70
*71-72
*73-87
C20
*60-64
*65-70
*71-87

Tie Rod Adjusting Sleeves
Grouped by Differences:
C10 and C20
*60-64
*65-70 (5/8" thread)
*71-87 (11/16" thread)

Centerlink:
Grouped by Differences:
*60-62
*63-64
*65-70
*71-72
*73-87

Pitman Arm:
Grouped by differences:
C10
*60-66 Manual
*60-66 P/S
*67-72 Manual
*67-87 P/S (Specify Year When Ordering)
C20
manual:
*60-66
*67-68
*69-70
*71-87
Power Steering:
*69-70
*71-87

Idler Arm
Grouped by differences:
C10
*60-62
*63-66
*67-87 (Specify Year When Ordering)
C20
*60-66
*67-87 (Specify year when ordering)

Steering Box:
Manual
*60-62
*63-66
*67-87
Power Steering

[N2TRUX]

There are only three forums to be concerned with. Those are 60-66, 67-72, and Suspension. If 60-66 and 67-72 have a "Disc to Drum" FAQ that links back to the Master FAQ in Suspension then its not so bad. There would be no posting in the main threads, with links to discussion threads instead.

[k1rodeoboater]

BTW something that may be helpful, especially for the idiots/newbies like myself, would be to add these links to those threads/stickies.

http://auto.howstuffworks.com/auto-p...ower-brake.htm

http://auto.howstuffworks.com/auto-p...ster-brake.htm

http://auto.howstuffworks.com/auto-p...drum-brake.htm

http://auto.howstuffworks.com/auto-p...disc-brake.htm

[lolife99]

60-70 Truck Wanting:
6-Lug Drum to 6-Lug Disc Conversions:
1) This 6-lug disc brake swap will include all of the above 5-lug information.

2) The only difference is the use of an aftermarket 6-lug rotor.
* These rotors are new castings.
* These rotors have been drilled with the correct 6x5.5" 6-lug pattern.
* These rotors have the correct 7/16" lug studs that match the original drum brake lug studs.

3) Several aftermarket suspension vendors sell these rotors,... such as:
* ECE (Early Classic Enterprises).
* POL (Performance OnLine).
* CPP (Classic Performance Products).

4) All 63-70 "conversion" stock height and drop spindles will work with these 6-lug rotors.

5) All 71-72 stock oem and drop spindles will work with these 6-lug rotors.

6) If using a 73-87 spindle,... it must be the HD spindle, that works with the 1-1/4" wide rotors.
* The 81-87 LD spindles will not work with these 6-lug rotors.



*http://www.earlyclassic.com/tech.asp...arly%20Braking
*http://www.earlyclassic.com/tech.asp...h%20And%20Whoa

6-lug Rotors:
*http://67-72chevytrucks.com/vboard/s...ght=Disc+Brake

[lolife99]

Suspension Rebuild When Adding Disc Brakes:
* http://www.earlyclassic.com/tech.asp...%20Direction-2

[LostMy65]

Would it make sense to rename this thread to;
" "Drum to Disc" Conversion
Threads,... " ?
Posted via Mobile Device

[lolife99]

Originally Posted by LostMy65

Would it make sense to rename this thread to;
" "Drum to Disc" Conversion
Threads,... " ?
Posted via Mobile Device

Ha.
I never even noticed.
That's a great idea.
Thanks.

[JasonBird]

this thread is awesome! i just picked up a 73 or 74 complete front crossmemberand i'll be installing it on my 67 soon. this is going to be a great resource for me!! thanks to all that have contributed!

this place rocks!!!

[lolife99]

If anyone has complete "crossmember swap" links for adding a 71-72 or 73-87crossmember to a 60-62 specific "X" style truck frame,... please PM them, to me.
I will add the info to this thread.
I would like complete "start to finish" tech articles, if some of you guys have them saved on your computer.

I am not very knowledgeable with the 60-66 trucks.
So if any of you 60-66 experts can correct my mistakes,... please let me know.

Hopefully we can turn this into a FAQ that we can reference.
Thanks.

[treveiger]

Answered in this thread:
http://67-72chevytrucks.com/vboard/s...d.php?t=443891

Lolife99.

[milner]

Thank you for this! I am just about to put discs on my 70 and this answered all my questions I had.

[lolife99]

Originally Posted by milner

Thank you for this! I am just about to put discs on my 70 and this answered all my questions I had.

Great.
That's the plan.
We'd like to throw out as much info as possible, before members attemp this task.
Feel free to ask more questions, if you run into problems.

[lolife99]

Originally Posted by kev2809

i dont mind stickies, maybe make a new thread in the suspension faq section for all the different setups...maybe?

Ok,... here's the break-down of what you'll run into.
(this relates to just 1/2-ton conversions)
DRUM TO DISC CONVERSIONS

60-62 truck with:
63-70 crossmember
71-72 crossmember
73-87 crossmember

63-70 truck with:
63-70 crossmember
71-72 crossmember
73-87 crossmember

71-72 truck with:
71-72 crossmember
73-87 crossmember

60-72 trucks with "unknown" crossmember swap?
This is where it's hard to determine the correct parts needed.

Spindle Problems:
71-72 spindle on 60-62 trucks
73-87 spindle on 60-62 trucks

71-72 spindle on 63-70 trucks
73-87 spindle on 63-70 trucks

71-72 spindle on 71-72 trucks
73-87 spindle on 71-72 trucks

There are two styles of 73-87 spindles:
73-80 HD 1.25" wide rotors.
81-87 LD 1.00" wide rotors.
(also the 81-87 1/2-ton trucks could have the HD rotors)

All associated parts need to match the rotors.
(bearings, calipers, rotors,... all have to match the spindles)

All aftermarket 6-lug rotors ONLY work with the 1.25" wide HD spindles.

Aftermarket Spindles and Drop Spindles:
This is the best method of getting the correct spindle for the year of your truck.
Spindles are sold for the following years, that require no balljoint or tie rod change:
C10
60-62
63-70
71-72
73-87 (HD 1.25" wide rotors)
81-87 (LD 1.00" wide rotors)
C20
71-87


Upper Balljoints:
Grouped by Differences:
60-62
63-70
71-72
73-87

Lower Balljoints:
Grouped by Differences:
60-62
63-70
71-87

Inner tie rods:
Grouped by Differences:
60-62
63-64
65-70
71-72
73-87

Outer Tie Rods:
Grouped by Differences:
60-64
65-70
71-72
73-87

Tie rod Sleeves:
Grouped by Differences:
60-64
65-70
71-87

This is just a sample of all the different directions the questions can go.

[lolife99]

Originally Posted by kev2809

also, isnt the 71-72 the first prop valve to have disc/drum setup...since disc brakes werent availve til 71?

Correct.
The 71-72 Prop valve is the first disc/drum prop valve.
They are also unique.
They have 1 front and 1 rear line "in" from the master cylinder,... and have 1 line "out" to the rear brakes,... BUT,... only have 1 line "out" to the 2 front wheels.
This is because the 67-70 trucks, and the 71-72 trucks,... both have a "T" fitting on the back side of the crossmember to split the front brakes to the left and right wheels.

All the 73-87 prop valve (and most aftermarket prop vales) have 2 front brake line "out" ports.
This is because the 73-87 prop vavles were frame mounted in front of the engine, and had:
* 2 individual lines "in" (1 line "in" for the front brakes, and 1 line "in" for the rear brakes).
* 2 lines "out" to each front wheel's rubber caliper brake hose.
* 1 line "out" to the rear axle where it gets split again at a "tee" in the rearend housing.

So when you try to hang the 73-87 prop valve (or aftermarket prop valve), on a bracket under the master cylinder on the stock 67-72 trucks,... you will be required to plug 1 front line "out" port.

I'm not very familiar with the earlier 60-66 trucks smaller M/C.