I just bought a 24 hallet I've got a low hour GM crate 502 that's going in to replace the tired 454 mag. It's an older crate motor (not the 502/502) that has a hydrualic flat tappet cam: duration (@ .050"), is 220/220, max lift is .500/.500. The heads are GM rectangular port w/ 2.19/1.88 valves. Right now the motor has an 850dp, the GM hi-rise dual plane, & imco headers exiting above the waterline. The motor was advertised as 440hp & 515lb/ft. Would there be much to gain with another cam, would a victor jr. type intake kill my low end too much? If you've got a 24 hallet with a similar 502 I'd love to hear what kind of numbers you're getting or what mods seemed to pay off.