Nuts&Bolts, that's a really nice frame-up-spotless-cherry-super-clean "basket case" you've got there. If it steers real easy with those wide radials you'll probably find you need more caster. I replaced my original 2° shims with 4° shims when I put radials on my truck, but measurements showed I only have 3° of actual caster. The old leaf springs on the front of my truck are a bit de-arched and I think that may cause a loss of caster angle. I can tell you I wish I had maybe a 5° shim for better tracking and self-centering after turns.
