Colin
I will talk to a friend that builds lots of engines for the drags. His specialty is SBF but he builds big and small block Fords, Chevy, Mopar and of course due to demand he is also now doing Hondas, etc. I will ask his opinion.
There are a couple of superb Ford engine builders that frequent this site so I am sure that you are going to get some solid advice. The very strong Canadian dollar is also going to help with your project no matter what type of engine you decide to run.
Wayne