I got to do similar to mine, I'm gonna start from scratch and design my own under the hood wiring, I don't know how good you are with wiring, I'm ok, with a little thought and research I can get it done, there's only a few circuits to deal with, you probably want some version of modified stock, learn all the stock under the hood circuits first, then figure out how to get back to stock then figure in your upgrades then draw it all out then go about rewiring it. You should have it decently mapped out in your head before starting.