Okay...I know this reply is about a year old...sorry...was going through older posts when I came across this one.
Educate me about how the '86-'93 style Mustang fuel injection would benefit an AMC Engine?
Seems I am missing something big here.

Wouldn't a person need a custom intake that would play host to the Ford plenum/throttle body, injectors and other related parts and pieces?
Without me knowing more, I would think an EFI controlled distributor is small potatoes compared to these other issues to solve.