Ford guys,
I say 305 HP factor. This 427 compares favorably (I think) to the 1965 Dodge 426 street wedge. The 427 has a approximate .050" larger cam and a few CFM over the mopar.
So the question would be: is it worth 37 CI over a 390 / 315 with all of the inherent advantages a 390 has?
Obviously I'm bored...