85 c10 body with a 70s 454
Need a tranny with 4 gears and overdrive. It’s a
Chevy 454 that’s bolted to a th350 as far as I can
tell. Need to know what tranny can fit in it and bolt
up to it. It was swapped to an 8 lug front and rear
end(truck originally a 4.3) has the heavy duty dually
rear end and heavy duty braking sytem.