73 Dart Swinger "Tetanus"

However, there is a small company who specializes in modifying the harness and reprogramming the ECM so you can use them. The name escapes me at the moment, but I will find it an post when I get the chance.

FYI, you just tell him the year model, engine and trans.
Was it Syked ECU Tuning you were trying to think of? I only recently heard about them. Have not tried them yet.
Website says they can do VIN programming and security system disables, to make swaps easier.