I've seen a dyno of GT40X with F-cam that was 290 rwhp, imho thats the only FRPP cam I'd try. Comp XE grinds are much better, and a custom even more so. Lunati, Crane, and Crower have some good ones as well.
The Edelbrock E-Street heads are not a bad deal for around $899 new, you of course need...