[Excaliber]

Ah, I see what you mean. My guess for the BEST horse power (absolute) would be something like the TW heads. For best overall street application perhaps the AFR heads.

Perhaps the Ebrock heads, with some work, would support 400 horse on a 302?

Max, I had a bone stock 302 (220-225 horse) with a 3.50 rear gear and the ultra low 1st gear ratio of a T5. The car was a lot of fun, up to about 90 mph, when it would lay down and die. But it WAS a real tire smoker, given the gear ratio's, and "quick enough" around town and out and about. OK,,, eventually it wasn't near enough ponies, just sayin', even limited power in a Cobra is still a lot of fun.