There is little difference in any of the fox bodies as far as the engine compartment and fit for a 460. I have done an 80 Capri and am currently doing an 87 GT. Hood clearance is an issue with all of them but you can space down the K member and gain some clearance. D&D makes some shorty and mid length headers that solve the ground clearance with the more common Hookers. Tubular K member helps some but it can be done with the factory K member too.
Wiring is less complicated with early carbed foxes but it's really not that big of a deal.
Starting with a later 5.0 car will get you an 8.8 rear that will handle the big block with some upgrades.
Pick the one you like the most (four eyes, late model aero, coupe, hatch, convert) and go for it!
However the foxes are flimsy in the unibody department, so I would plan on at a minimum sub frame connectors.
Last edited by angrywombat; 03-31-2017 at 09:48 PM.