Ok, sounds reasonable.
6 degree shims it is.
I will be rebuilding the springs anyway so no prob with running the center pin through the shims.

Thanks for the input.

I have seen many straight axle vehicles with shims already on them. but pretty sure mine has none. I would figure it was built in and the spec was just for "if its not correct add shims to adjust it"
I will look more closely at my truck and see if there is any caster already.


1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am