IM putting a 95 motor into my 72 duece. My question comes when Im figuring out how much of the harness I need to use. As far as the motor goes can I just plug the engine harness into the ecu and will it work as long as I power up the ECU? Also can I just go from the wires coming from the battery and fuse box and relays and keep those? and get rid of most of the body harness? I just wnat to simplify the harness as much as possible. I know I know why not stand alone. Well I might take that route later on but id like to figure this out and go through the ECU since I put a FB dash in and want the gauge cluster and ignition to all work. Well any and all info would be great I would really appreciate it. Thanks

 

So nobody knows anything about this? Anything?