I'll assume your talking about a borg warner t-5 which won't hold up to what your building. I'm considering a putting an early NV4500 in my 68 C20 it looks like it may bolt up. I have an A833 behind my 292 it's 4 spd, fourth being an OD. GM offered the A833 as an option (RPO MY6) from 82-86, bolts right in no adapter.

Larry

I don't own a vehicle that isn't old enough to drink.