I have long wondered about putting the newer Mustang Eco turbo four in my '55. 300 HP and a lighter motor that looks like it would fit nicely. Could this be what you are doing? I used to have a '55 with a small block chevy in it. It drove much better, but I was scorned for not having it 'all Ford'. It was a lot more fun to drive.
In any case, it looks like it will be great when finished.