I read the sticky and it talks about custom harnesses and stuff. but what I'm wanting to do to my 98 c1500 4.3L. Is take a lq4 from a 2004 van with cable tb. I'm going to get a ecm and harness out of it too. I want to run a 4l65e. What all do I need to do. I know about the frame and mounts i'm mainly concerned with will the harness and ecm work on my truck?