hey guys i'm new to this series of engine and i know all the parts i need o do the swap what i'm curious about wiring harness. My motor is out of a 2003 silverado pickup and i plan on using a th350-400 is there anything special i gotta do the transmission part of the harness or can i just leave it.

 

I would recommend keeping the vss, especially if you are going to put a big cam in it, will help with part throttle drivability. You can get a reluctor wheel and housing for the th350 and 400. Tune you will use is manual transmission. Hope that helps.

Jon
Psi