[tom406]

"huge AL heads with the plugs on top like the hemi 426."

Please do find out more about where you got this ride. The engine you're describing is an SOHC 427, aka "Cammer". It was never a production install, but many were available over the counter, and Ford built several mules and exec cars, including the Ford racing chief's '66 Ford 7 Litre (Galaxie) hardtop. Hundreds of engines were produced, and many production-looking components such as exhaust manifolds were tooled while they tried to get it homologated for NASCAR to compete with the 426 Hemi. Super neat looking motor, but had a 6ft long timing chain on the front of the motor to run the overhead cam setup. Racers learned to run the second driven valvetrain several degrees advanced to make up for chain stretch at high rpms.