EFI ECM: which would you choose and why?

I'm going to agree with 67Dart273 on the EECIV Ford system. Calibration for an ECM from a 5.8l/351 would likely be close for a 360 Mopar There's some good documentation at this site.

http://fordfuelinjection.com/

Ford wiring harnesses are also mercifully easy to separate from the rest of the vehicle wiring.ECM is usually located behind the front passenger side kick panel and you can easily follow the wire thru the firewall grommet and up to the two engine plugs. Also need the relay panel from under the hood.

Adding an EDIS ignition would also be an interesting project.