I have an chance at a low mileage 2008 Gen 4 L76. It is not mated to a transmission, what I was wondering if I could put a newer 4L60e behind the L76? Could I get a harness and modify it to be stand alone, with an E38 ECM and a T42 TCM, and what would be a good donor vehicle and or program I could use to get everything to work together? Any help will be greatly appreciated.