I'm going to tell you if you're interested in ease and reliability go with the factory EFI setup from a magnum motor. It just takes a few relay and keyed on power source to have it running. I've successfully wired both OBD1 (pre'96) and OBD2 ('96-03) engines into my '74 duster for the last 5 years. I would be happy to answer questions about the process or the magnum engines/electronics. There are tuning options available for the OBD2, which makes it the more desirable of the two if you're planning to modify the engine. For my OBD2 setup I'm also running the factory 4speed AOD transmission.
