My 4wd to 2wd Conversion

[Ford Assassin]

Hey guys, I starting posting some of this in my 5.3/4L80e swap build thread, but figured maybe it'd be easier to find in its own thread for those interested in doing the same thing down the road.

http://67-72chevytrucks.com/vboard/s...d.php?t=489826

Anyway, the truck is a '86 K5 that already has a '73-'75 full convertible conversion and a 5.3/4L80e swap. After completing the swap I went off road a few times and realized that it just isn't my thing anymore. So if I am not going to use a 4x4 for its intended purpose I really don't wanna climb in/out of it for ever and wouldn't mind a little better MPG. Plus 2wd K5's are somewhat rare and never offered after '82.

Here are a few pics of the truck before starting the 2wd conversion:

[1bad87]

nice setup where did u get the bracket for the old a/c comp

[Ford Assassin]

Originally Posted by 1bad87

nice setup where did u get the bracket for the old a/c comp

Its not the old A/C compressor. Factory had the old radial R4, this is a Sanden 508. I bought the bracket from Kwik Performance (www.kwikperformance.com).

However, if you want to keep you R4 with an LSx, Novak sells the brackets you are looking for. Personally I like to avoid the R4's like the plague, they are junk IMO.

http://www.novak-adapt.com/catalog/a...cation_kit.htm

[Ford Assassin]

Then came time to tear into the K5... Sold everything....

Be prepared to use a grinder and a decent stone, because you will be removing a lot of rivets. Rear hangers, rear and front bumpstop brackets, front crossmember, front brake like brackets, etc...

[Ford Assassin]

Since I am going to use 56" springs, I needed to move the rear hanger 4" further to the rear. Most truck frames have the holes in the frame pre-drilled since 56" springs were optional, since K5's weren't offered 56" I just measured and welded them in.

More pics......

[Ford Assassin]

After I decided to make the push, I started searching for parts, lucky for me I found a guy that bought a 2wd '87 long box just for the body and had no interest in much else (except steering box).

So I cut the whole frame off at the firewall and grabbed the 8.5" 10 bolt (open) with 3.42 gears (will add a Eaton True-Trac later). I also grabbed the rear leaf spring hangers (shorter than 4wd version).

After I got everything home I tore it all down, bagged all the bolts, and pressure washed everything. I knew since it was all apart I was going to 'snowball' and I'd end up rebuilding most of the the front end. Sure enough I bought all new urethane bushings, ball joints, rotors (1.25"), and calipers (reused 2 month old ceramic pads from 4wd).

A buddy also gave me a pair of 56" rear springs (stock K5 and most 1/2 tons are 52") with the center pin offset 4" to keep the wheelbase the same. The 56" springs have thinner leafs and the longer spring should provide a smoother ride, especially on a such a short wheelbase truck like K5's.

[trout]

wow this is nice info man

[Square_78]

Cool project. With the full convert top already done, are you going to keep the newer front end or put on a 73 style front fenders and round eyes? That would be the icing on the cake so to speak.

[Ford Assassin]

Originally Posted by Square_78

Cool project. With the full convert top already done, are you going to keep the newer front end or put on a 73 style front fenders and round eyes? That would be the icing on the cake so to speak.

Nope, keeping the '86 front end. Might put a phantom grill on it next (headlights behind the grill) or putting a '89-'91 front end on it. Never been a huge fan of the round headlight front end.
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[Ford Assassin]

Here are my wheels and tires, 245/45/20's on 20x8.5" rims and 275/40/20's on 20x10.5" rims.
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[lolife99]

Cool project.
I see you already swapped the rear hangers.
Some people that do a "flip-kit" in the rear actually use the 4x4 hangers, so the rear won't be so extremely low.
(lower than the front)
I'll be watching this thread.

[Ford Assassin]

Originally Posted by lolife99

Cool project.
I see you already swapped the rear hangers.
Some people that do a "flip-kit" in the rear actually use the 4x4 hangers, so the rear won't be so extremely low.
(lower than the front)
I'll be watching this thread.

Hopefully the rear won't be too low, I guess time will tell. As much as I hate them, I might install air shocks in the rear as a bandaid if the rear is too low, especially when I tow my camping trailer. Long term plans include going to a behind/below axle mounting air bags and removing all leafs except the top and overload springs.

[outcrydrummer]

Do you happen to remember which transfer case that was and do u have a pic of the crossnember. I just converted to a th400 and the transfer i got with it was that one but i dont have the correct crossmember.
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[Ford Assassin]

Hey guys, in the interest of keeping this thread from getting off track from the 2wd conversion, please PM me or ask questions in my original LSx swap thread.

http://67-72chevytrucks.com/vboard/s...d.php?t=489826

Thanks!!
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[meter swinger]

Thats gonna be one awesome blazer.
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[Square_78]

That sits perfect in the back! I like it.

[HarleyHauler]

Subscribed!

[lolife99]

The quick answer is to install your old 4x4 rear hangers.
Re-arching the springs is another option.
Maybe an "air-over-leaf" air bag install?

[Ford Assassin]

Originally Posted by lolife99

The quick answer is to install your old 4x4 rear hangers.
Re-arching the springs is another option.
Maybe an "air-over-leaf" air bag install?

I welded the 2wd to the frame, I'd rather not un-do that. I'll go back to the axle being under the leafs if need be, but I might just have to go the air bag route earlier than expected.
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[Ford Assassin]

Another shot leveled out and on jack stands...
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[Ford Assassin]

5.3 & 4L80e are back in the truck....
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[Ford Assassin]

Left the top 56" spring, the rest of the springs replaced with the Blazers old 4x4 springs, including the overload spring.
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[Ford Assassin]

Finally dropped the ass end down.

Swapped out the overload spring for a flat instead of the curved one.

Looks 10x better IMO.
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[lolife99]

Looks perfect.
Make sure you check the area directly above the rearend's center section.
It will be really close to the bed floor.
(nothing a notch won't fix,...)

[1bad87]

looking good