The engine. When i bought the engine the guy already had the harness modified. At the time I thought it was great. Knowing what I know now, it's a little more hack than I would like for a 3000 mile trip. Its nothing too bad, but how there is only one relay powering everything including the fuel pump, and only one fuse on the entire system. And I did take a couple short cuts to get it running that are still in existence like just using a normal cheap butt connector with no shrink sleeve for the starter wire. A bunch of little things that leave me without a peaceful feeling about the engine wiring.
So I'm going to pull it all back out. And I'm going to mount the ecm under the hood instead of under the dash like is now. Its really just too big to fit nicely under the dash and it doesn't need to he there and makes things more of a pain. So I will be wiring it all up proper, and will need to lengthen and shorten certain wires I'm sure. As well as just re routing everything.