5.7 ecu/wiring

No point in getting wiring harness unless you know exactly how to separate and remove what you don’t need. You will be better off ready through the threads to determine what kind of management system fits your needs and checkbook. There are several types out there. Edlebrock, Mopar performance megasquirt, Hotwire, Fast EFI. You will also need a flex plate for the 727. if you get an ECU get an 05 or 09 out of a truck chances are it will not need to be flashed.