I have the early 550-406 Terminator EFI installed on a SBC with a non-electronic 700R4 transmission. I'm going to install a 4L60E transmission and was thinking about buying the 550-1012 Terminator X Max Stealth with transmission control to run the transmission. Are the ECM to throttle body harnesses the same between the two systems? It looks like the connectors are the same, but I don't know if they're wired differently. The reason I ask is that it'd be much easier for me to leave the original Terminator harness in the car and just replace the ECU and add the transmission harness. I can use the leftover parts between the two kits in another one of my cars.