[63 & 64 Bowties]

Great writeup. I'm thinking of starting something similar. I have a 92 tbi motor and 4L80E trans out of a dually. I originally was gonna swap the tbi to carb and install a HEI (then I'd have to get a different trans too) but I see where a lot of you are doing the harness and tbi install. I have the complete donor truck and so far I've unhooked the harness from under the hood and taken the ECM out. I have no idea what I'm doing though. I'm completely old school. I don't see mention of how to actually get power to the ECM. I know there are a few guys who will re-work harnesses for the LS swaps so that you only have to hook up three wires when you get it back. You didn't use the complete donor car's harness from under the dash and all did you? This is like an electrician's nightmare to me.