Big bucks...460 Ford Motorsport "Cobra Jet" heads

Bucks...Edelbrock Performer RPM's

Low bucks...429 FoMoCo Thunderjet heads 1968-1971

The first two are alloy, saving weight is a good way to increase the "seat-of-your-pants" horsepower.

The last is a good day's scavenge in some wrecked suicide-door T-Birds.