Re: Performance Steering & Handling?
 

Id go 3/4" lower and 1/2" on the upper. +1" on the upper is getting pretty long and they bend pretty easy.

Re: Performance Steering & Handling?
 

Thank you for the information. It is timely as I have been looking at replacing the control arms on mine. The current lower arms are factory arms. And the uppers have already been replaced with UMI versions but they are the non-adjustable versions and the truck has too much positive camber. So they need to be replaced with some adjustable ones so I can get some negative camber.

Re: Performance Steering & Handling?
 

That's unusual that you can't get enough negative camber. Usually the problem is not getting enough positive.
Look into IMCA hobby stock upper control arms. They aren't priced too bad and you have the option of 1/4" shorter than stock on the right arm or 1/4" longer on the left arm. Either arm can be ran on either side depending on exhaust clearance you can also put longer bolts in for the upper control arm.
There's also just enough room to drill new holes for the upper control arm right below the stock ones. That will drop the inner mount about 5/8" and have the same affect on camber gain as running a taller upper ball joint

Re: Performance Steering & Handling?
 

Shooting from the hip here, but if memory still serves me, the camber was in the +.08 to +1.1 range. One side has no threads showing past the upper control arm nuts and the other side has maybe 2 threads showing.

I looked at putting longer bolts in with custom spacers to replace most of the shims but the truck has a LT1 in it and room is at a premium. The current UMI upper arms have 1/2 longer ball joints so if I get UMI adjustable uppers I can reuse the ball joints. UMI says their adjustable uppers are approximately 1/2" shorter than the non-adjustable uppers when fully shortened.

The front and rear suspension has less than 1500 miles on it. The rest of the truck has over 220k miles with the first owner being the US Forest Service. The engine has under 500 miles since being rebuilt. I recently purchased the truck and am getting things dialed in.

Re: Performance Steering & Handling?
 

Here is a link with factory part upgrades for 1st & 2nd gen S10's. Lots of junk yard parts to tune up the handling. As well as RPO codes to help ID that rear end in the wrecking yard.

See ya out in the yard!

https://www.s10forum.com/search/9992...10&o=relevance