Probably so. With longies, you have to make sure that the slightly higher location won't cause any interference with something like clutch, or auto tranny linkages.
There are some that flat out won't fit, such as the 2-piece Blackjack brand. What they do is have the front two cylinders wrap in front of the motor mount towers, then join back up to the rear two behind the towers. With that setup you can't just raise things up and still have them fit.
I don't remember hearing anyone having trouble with the shorties. Other than paying the higher price that is!
And speaking of that, with the 351 and a set of the WH Extreme motor mounts you could probably fit a Mustang shorty just fine. Hood clearance though, now that might be another issue.
Paul