[b454rat]

350 700 38s with 4.10s won't be bad, probly just leave it in 3rd and not use OD. Use OD on the highway, RPMs will be low almost too low to be in the torque curve of the engine.

I ran 40" boggers with 3.73s in my old truck, but had a 454. My crew (if it ever gets done) has 4.10s with a 454. Many hills around where I am, and won't be doing much long distance road trips with it.