Ok, so I am starting this process backwards. I have been offered an 06 6.0L out of a K2500. I am currently looking for a GMT400 truck to drop it in.

The heart recipient must be 4x4, preferably a 2500 or 3500 but a 1500 would be ok if t was a 3 door.

Does it matter what truck I swap into year wise as far as compatability? I dont have a harness (its a low mile Dealer takeout) and i have a 96 built 4l80 to use in case i get a 1500.

I know its not just drop in but some advice would be nice.

Found 2 94 K2500's one long bed HD one short bed LD both w/ NV4500's. This will be a DD/work truck when done.