[nickp51chevy]

It' just a thought, I don't know exactly because I put a SBC in my truck w/ the s10 frame. Leave the engine and trans on the frame and set the cab and front clip on the frame and see if you do need to move the engine. You don't want to make more work if you don't need to. I asked that question once before because I want to build an AD on an s10 4x4 frame. I really don't think that you need to move the engine. One thing that I do know is that the 4x4 frame is a bit wider behind the front wheels. I've seen someone trim the frame down and box it in again. Just get use to getting your cab on and off the frame.

Looks good. Keep it up and take the time to do it right. No need to rush. Safety first, and who likes rework?

Don't toss any part off you GMC until your done building. You never know what you might need.