economic 318 aftermarket heads

Hers what I would do. Go scare up a set of 302 casting heads,hand lap the valves and slap new seals in it. Throw them on and drive it,might last 20 or 30 thousand miles. Cheap compression boost and Im sure you can find a set here or in the wreckers cheap.

Good question on why the 360 heads are more.Lord knows theres lots of them floating around. Maybe email and ask? I'd love to here thier explanation..

Probably higher demand.