As many of you know I am swapping my 3.9 for a 5.9, one question I am iffy about is do I need a PCM the same year and same for the harness as my truck? According to one person i do but according to another I don't. I asked for both of these with the engine and if they are there they are giving me both. Of course from 1998. Does anyone know this, and can maybe clear this up for me. I am heading out in the morning. So sooner the better.

Chris