- Joined
- Aug 29, 2010
- Posts
- 47,128
- Reaction score
- 9,299
- Location
- OKC, OK
- First Name
- HotRod
- Truck Year
- 85 K20 LWB
- Truck Model
- Silverado
- Engine Size
- 454 - Turbo 400 - 3.73
Only a guess, but since 4.3 is a 5.7 (350cu in) with 2 cylinders cut off the back, I'd imagine the 4.3 would be the better more likley to match your 5.7 set up. No telling though. GM might have have just a different water pump and Tstat housing the change the direction of the inlet/outlets.
Your cheap way out on the trans, might be to go an auto NON electric trans and a B&M shifter.
Your cheap way out on the trans, might be to go an auto NON electric trans and a B&M shifter.