Just bought a 67 SS convertible (my first). Somewhere along the way, a 69' 350 4 bolt replaced the original 350. The guy I bought if from had it rebuilt last summer and the only changes from stock were: 750 holley, Ed RPM intake, MSD ignigiton, and Hedman headers. Would adding on the Edelbrock rpm heads and matching rpm cam be too much for this stock engine? Would I actually see good gains compared to exisiting stock setup? I'd hope to get around 400 hp without bottom end work.?

Thanks

The heads would be a good move, but stay away from that cam -- there are much better choices out there.