subedriver

Ok so this is not a typical rear swap or at least I don't think it is. I have a 94 camaro z28 that was originally a 3ch car. I have swapped everything in it for a ls swap. Dash, entire car wiring everything basically. The wiring harness that i have in the car is from a 4ch car. I do not have all the traction control modules and have no desire to have it function. I would like to keep abs though if possible. I'm having a 9 in built for it. Also my brake distribuiton box is from a 3ch ls car. Is this possible or am I looking at having to do without both? Or should I just find another entire donor wiring harness and rewire the entire car again? Thanks