What computer to use for EFI in my Dart

must have been OBD I, we have flashed factory OBD II pcm for 408's with .570 lift cams on 110 LSA. Blown strokers with large cams using factory pcm are very common place now days. If you have a very good idea of how injection works, fuel maps and timing curves then you might try mega squirt system but you are on your own for programming and tech help other than their forum which is not Dodge specific.