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#26 |
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Join Date: Apr 2000
Location: Leesburg, GA
Posts: 746
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dream68 can you elaborate on the 88 truck you got the parts off of. Was it a 1/2 ton or 6 lug 3/4 ton? I have Hollanders on my laptop and would be able to post some info for folks. Hollanders does show the 67-70 vs 71-87 3/4 ton lower control arms being different. Which did you use? I have heard you could use the 88-91 3/4 ton 2wd 6-lug rotors on 71-up spindles using 71-up calipers. I went to Autozone and had them pull a 71 1/2 ton 5-lug rotor and a 88 3/4 ton six lug rotor and they were basically the same and appeared to use the same bearing.
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FOUNDING MEMBER OF THE DRUM BRAKE CLUB Second Owner 70 C-10 Second Owner 93 GMC C1500 Third Owner 99 C2500 Crew Cab Short Bed |
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#27 |
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Join Date: Dec 2002
Location: kelowna b.c. canada
Posts: 75
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JJR: it was a 88 1/2 ton chev 2wd that all these parts came from. everything was ripped off the same truck, even the gearbox, but the gearbox will not fit...
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'68 Chev C-10 '91 Western Star (workin wheels) Just an ole time truckin idiot! Jim G. |
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#28 |
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Join Date: Apr 2000
Location: Leesburg, GA
Posts: 746
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Hollanders shows two spindles used on an 88 c1500 2wd. One for a 1" rotor and one for a 1 1/4" rotor. The spindle for the 1" rotor came on 88-91 c1500 and had a 1 1/4" inner bearing surface diameter. The spindle for the 1 1/4" rotor(which is probably what you have) came on the following:
CHEVROLET PICKUP TRUCK 88 2500 Series; 4x2 CHEVROLET PICKUP TRUCK 88-91 1500 Series; 4x2, 1-1/4" thick rotor CHEVROLET PICKUP TRUCK 89-91 2500 Series; VIN models "C/K", 4x2, 6 bolt wheel CHEVROLET PICKUP TRUCK 92-98 1500 Series; 4x2 CHEVROLET PICKUP TRUCK 92-98 2500 Series; 4x2, 6 bolt wheel CHEVROLET PICKUP TRUCK 99 1500 Series; exc. Silverado; 4x2 CHEVROLET VAN 96-99 1500 Series CHEVROLET VAN 96-99 2500 Series; 7300 lb. GVW GMC PICKUP TRUCK 88 2500 Series; VIN models "C/K", 4x2 GMC PICKUP TRUCK 88-91 1500 Series; 4x2, 1-1/4" thick rotor GMC PICKUP TRUCK 89-91 2500 Series; VIN models "C/K", 4x2, 6 bolt wheel GMC PICKUP TRUCK 92-98 1500 Series; 4x2 GMC PICKUP TRUCK 92-98 2500 Series; 4x2, 6 bolt wheel GMC PICKUP TRUCK 99 1500 Series; old style (flat, pull-up outside door handle), 4x2 GMC VAN 96-99 1500 Series GMC VAN 96-99 2500 Series; 7300 lb. GVW SUBURBAN 92 1500 Series; 4x2 SUBURBAN 93-96 1500 Series; 4x2, vacuum brake booster SUBURBAN 97-99 1500 Series; 4x2, gas TAHOE/YUKON 95-99 4x2 '95 up have ABS sensors on the brake shield. 1-3/8" inner bearing surface dia. Inner bearing consists of #LM48548 cone & #LM48510 cup. Heavy duty chassis option code is F44.. 15981299 R. 15981298 L. For lower control arm: the 67-70 3/4 lower arm can come from the following: CHEVROLET FORWARD CONTROL 68-70 20 Series CHEVROLET FORWARD CONTROL 68-70 30 Series; 7200 lb. rear axle CHEVROLET PICKUP TRUCK 67-70 20 Series CHEVROLET PICKUP TRUCK 67-70 30 Series; 7200 lb. rear axle CHEVROLET VAN 71 30 Series; drum brake GMC FORWARD CONTROL 68-70 2500 Series GMC FORWARD CONTROL 68-70 3500 Series; 7200 lb. rear axle GMC PICKUP TRUCK 67-70 2500 Series GMC PICKUP TRUCK 67-70 3500 Series; 7200 lb. rear axle GMC VAN 71 3500 Series; drum brake SUBURBAN 67-70 20 Series SUBURBAN 67-70 2500 Series If the 71-up 3/4 ton lower control arm can work they can come from the following: CHEVROLET FORWARD CONTROL 71-72 30 Series; 7200 lb. rear axle CHEVROLET FORWARD CONTROL 71-89 20 Series CHEVROLET FORWARD CONTROL 73-78 30 Series; non-removable carrier CHEVROLET FORWARD CONTROL 79-84 30 Series; drum rear brakes, sgl. rear wheels CHEVROLET FORWARD CONTROL 85-92 30 Series; exc. hvy. duty front susp.; drum rear brakes, sgl. rear wheels CHEVROLET FORWARD CONTROL 93 30 Series; exc. hvy. duty front susp.; drum rear brakes, sgl. rear wheels, w/o 9L6 brakes CHEVROLET PICKUP TRUCK 71-72 30 Series; 7200 lb. rear axle CHEVROLET PICKUP TRUCK 71-88 20 Series CHEVROLET PICKUP TRUCK 73-80 30 Series CHEVROLET PICKUP TRUCK 81-88 30 Series; std. duty susp. CHEVROLET PICKUP TRUCK 89-91 2500 Series; VIN models "R/V" CHEVROLET PICKUP TRUCK 89-91 3500 Series; VIN models "R/V", std. duty susp. CHEVROLET VAN 72-78 30 Series GMC FORWARD CONTROL 71-72 3500 Series; 7200 lb. rear axle GMC FORWARD CONTROL 71-89 2500 Series GMC FORWARD CONTROL 73-78 3500 Series; non-removable carrier GMC FORWARD CONTROL 79-84 3500 Series; drum rear brakes, sgl. rear wheels GMC FORWARD CONTROL 85-92 3500 Series; exc. hvy. duty front susp.; drum rear brakes, sgl. rear wheels GMC FORWARD CONTROL 93 3500 Series; exc. hvy. duty front susp.; drum rear brakes, sgl. rear wheels, w/o 9L6 brakes GMC PICKUP TRUCK 71-72 3500 Series; 7200 lb. rear axle GMC PICKUP TRUCK 71-87 2500 Series GMC PICKUP TRUCK 73-80 3500 Series GMC PICKUP TRUCK 81-87 3500 Series; std. duty susp. GMC PICKUP TRUCK 88-91 3500 Series; VIN models "R/V", std. duty susp. GMC VAN 72-78 3500 Series SUBURBAN 71-88 20 Series SUBURBAN 71-91 2500 Series This statement makes for some confusion: This arm (71-up) may have two different ball joints one being light duty, the other being heavy duty. I am assumming they would be different diameters. I hope this info helps.
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#29 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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JJR,the info given to me on the 3/4 tons(from local napa) is the ball joints interchange from 71-86 or 87 on the pickups. I didnt see his book, so it was just info given to me. I do know from experience that the 71 3/4 ton lower ball joint will press into the 67-70 3/4 ton lower arms, but the steer stops are different on the older arms(same deal as the 1/2 tons, it will shorten the turning radius), & will require a little grinding on the stops on the spindles to straighten it up.......crazyL
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#30 |
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Join Date: Apr 2000
Location: Leesburg, GA
Posts: 746
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That is good to know Crazy Longhorn. The local pull-a-part tends to have a good selection of 3/4 ton trucks and occationally an 88-up. The get $15 for control arms and spindles. I have also seen several sets of 88-up spindles on e-bay go dirt cheap. People put drop spindles on and basically give away the old ones. Since a already have a set of 71 1/2 ton control arms and spindles and new ball joints for them, I will probably end up buying a set of 6-lug rotors and use what I have.
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#31 |
Registered User
Join Date: Dec 2002
Location: kelowna b.c. canada
Posts: 75
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OK GUYS: the steering linkage is a tad sloppy in the spindle, so this is what you do. use the 68 intermediate shaft with the 88 tie rods. the inside tie rod end is changed to PART# : MOOG ES2020RL.(tie rod end). This setup fits and looks like a dream with no binding anywhere. the 88 tie rods are also bulkier than the 68 original setup..... I will be in touch with more updates as i go... KEEP ON TRUCKIN MAMA!!!!
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'68 Chev C-10 '91 Western Star (workin wheels) Just an ole time truckin idiot! Jim G. |
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#32 |
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Join Date: Dec 2002
Location: kelowna b.c. canada
Posts: 75
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ALL PARTS NEEDED FOR BRAKE CONVERSION ON 68:::1968 1/2 ton top a-arm, 1970 3/4 ton bottom a-arm, 1988 1/2 ton ball joints(both), 1988 1/2 ton spindles, calipers, and rotors, 1968 1/2 ton intermediate shaft, 1988 1/2 ton tie rods, with the inner tie rod end changed to part#: MOOG ES2020. Brake lines can be changed if need be!!! GET TO WORK!!!
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'68 Chev C-10 '91 Western Star (workin wheels) Just an ole time truckin idiot! Jim G. |
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#33 |
More hobbies than money!
Join Date: Jan 2002
Location: Raleigh, nc, usa
Posts: 655
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This is great info...but...anyone know if this will work for a 70
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'70 cst10/swb 350, 3 on the tree, factory buckets. '70 GMC lwb 350/350 ps,pb '72 c-10 lwb 350/350 a/c, ps, pb '72 Blazer project |
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#34 |
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Join Date: Dec 2002
Location: kelowna b.c. canada
Posts: 75
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wnc mountain: i believe it should work because the boneyard told me the a-arms were the same from 68-70.
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'68 Chev C-10 '91 Western Star (workin wheels) Just an ole time truckin idiot! Jim G. |
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#35 |
Registered User
Join Date: May 2003
Location: Rural Virginia
Posts: 32
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72 to 68 front brake swap
New to the group and just saw your conversion. Tell me, i've got a streetable 72 donor truck. Can the front brakes be easily swapped in to a 68? Both are nonpower.
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#36 |
Registered User
Join Date: May 2003
Location: Sierra Vista, AZ
Posts: 9
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Brake swap to earlier years
I've followed this conversation with the understanding that this brake swap would apply for the 60-66. Can you offer your knowledge about this same swap applying to these year Chevys/GMCs?
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#37 |
Registered User
Join Date: May 2003
Location: Sierra Vista, AZ
Posts: 9
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Application to 60-66 models
Will this conversion apply to the 60-66 model Chevys and GMCs. I have a '63 GMC 6 lug that desperately needs more stopping power.
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#38 |
Registered User
Join Date: Sep 2002
Location: Hemlock, MI
Posts: 15
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Has anyone else tried this conversion? It seems like a cheap way to add modern brakes to an old truck but I would like to hear from others that have tried it.
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#39 |
Registered User
Join Date: Jan 2004
Location: North East Alabama
Posts: 47
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Now where to find a set of 3/4 ton lower control arms cheap?
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67 GMC SWB Project:60 4BM 350 4SPD 67 Chevy C10 Custom LWB V8 Project 69 LWB IL6 3 on tree project 71 SWB Frame off project 72 LWB C10 Factory Tilt Project. |
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#40 |
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Join Date: Jan 2003
Location: Washington State
Posts: 8,831
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Have you had it on the road yet...?
Was wondering if you felt any difference in the way it handled with the change..?
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1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo |
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#41 |
Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,032
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will the 73-87 stuff work? i've got a 86 frame im gonna be scrapping here in a couple weeks.
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67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt. |
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#42 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
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You can just put the front crossmember off the 86 on your frame. A search on disc brakes should give you a lot of info on this subject.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#43 |
Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,032
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i already have discs on my truck...was wondering if it was any use to anyone else.
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67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt. |
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#44 |
Just Don't Stop!
![]() Join Date: Feb 2004
Location: Dallas
Posts: 1,239
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the 73-87 stuff will not work for this style conversion unless you someone wanted to buy the aftermarket 6 lug rotors...
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1968 C10 build in process TT LSA/6L90e/9" |
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#45 |
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Join Date: Mar 2004
Location: Butler PA
Posts: 3,032
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the 73-87 stuff has 5 lug.
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67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt. |
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#46 |
Just Don't Stop!
![]() Join Date: Feb 2004
Location: Dallas
Posts: 1,239
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Exactly. Not to mention it is a TOTALLY different swap. Parts used to do the swap are different.
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1968 C10 build in process TT LSA/6L90e/9" |
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#47 |
Just Don't Stop!
![]() Join Date: Feb 2004
Location: Dallas
Posts: 1,239
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yes, it looks like this... been running it for a while now so it doesn't look as nice but you get the idea. I used a 1990 chevy front end/parts that had 5 lug 1.25" thick rotors and went to AutoZone and bought new factory 6 lug 1.25" thick rotors and bolted them on.
Good luck.
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1968 C10 build in process TT LSA/6L90e/9" Last edited by FirstGen; 04-02-2005 at 02:24 PM. |
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#48 |
Senior Member
Join Date: Jan 2005
Location: Ontario, Kali
Posts: 2,427
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This is probably going to make a lot of disc brake conversion vendors mad
![]() Expect prices to go up on 3/4 ton lower a-arms and the 88 parts, or they will probably package your idea and still sell it for $700-$1000.
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![]() ![]() It ain't yours, if you didn't build it! Last edited by Dano69c10; 04-05-2005 at 06:54 PM. |
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#49 |
Just Don't Stop!
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Location: Dallas
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All in all, it's really not that cheap. I spent around $400 and I only bought what I had to plus two new rotors. You could easily spend $600 plus if you were buying all new bearings and rebuilding the calipers etc...
The only reason I did this swap was because I wanted to use all parts available at my local AutoZone, O-Riely's, etc. and not have to order special rotors from some company that could go out of business in 5 years.
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1968 C10 build in process TT LSA/6L90e/9" |
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#50 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,373
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Hey, FirstGen....
Can you provide any more detail about what exactly parts were necessary for your truck and what you got them off of? I've heard stories of people raiding 1994-1996 Impala/Caprice/Roadsters to get the 5-lug setup. I am wondering if there is a need to get new a-arms (upper or lower), ball joints, tie rods or intermediate shaft with the method you chose? I literally have the same truck as you (closer to stock though ![]() TIA
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If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. Last edited by shifty; 04-05-2005 at 10:50 PM. |
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