Blue My Mind, 1972 Ford Maverick

[streetrods]

The GT40p heads will give you head-aches. The port-configuration is not std ford small block. So unless someone makes a specific GT-P shortie/swap header... loosing battle. I you have reg GT40 heads available, they are better anyway. After that.. hell a well ported set of E7's from Patriot Performance will out flow the GT40p's.... The GT40p's were an Explorer V8 only head trying to add some life into a VERY restrictive engine compartment. The exhaust side revamp was to get as much flow through a crappy exhaust header/manifold location... simple truth.

The early explorers had the regular GT 40 heads..half way through 97 they went to the P head.. Stock the P heads flow as good as the GT 40's.. headers can be an issue but like the OP said he has more room in his engine bay so he can use 5.0 mustang headers..either the ford racing ones made for it or maybe some 5.0 long tubes..