Here is a pic to help visualize the difference in size between a Modmotor and a Windsor. The coyote is only about an inch or so narrower than the Modmotor.
I'm not saying don't do it because after all, I did. What I am saying is that it is more challenging than you might at first anticipate although, the supercharged versions are stunningly impressive in the power and torque departments. In the n/a space a 427 inch or bigger Windsor is a much better, more cost effective and dare I say, smarter choice.
Ed