[2500HD]

Originally Posted by MySons68C20

Did you ever get the return to center figured out? I'm having the same problem with the 68 with all new parts including a quick ratio Red Head steering box. I'm going to get my 2nd alignment at a different shop next week and want to be ready.
The first shop wouldn't/didn't give me numbers. The only thing I see is 1 1/8" shim on the pass side and a 1/16" shim on the driver side.

No not really. i had the same guy do the alignment again. and it is better but not great. it starts to return to center and then stops about half way back. i think i need more camber to get the tires more straight up and down. i have minimal shims in the front and none in the rear. Please let us know if you get it figured out. i will not be working on the front for some time. i currently have the rear out for rear control arm bushings, Eaton posi and 3:73 gear.