Jon has admitted straight up that the Boss9 heads are not intended to be a race head. They do work well and it is great that they will work on a standard 429/460 block, but they are definitely overshadowed by the *real* race heads available for the BBF. Stuff like the A & B 441 hemi heads and the A460, C466, D460, E460, Profiler and Blue Thunder heads exist to fill that market.

That being said, I wouldn't mind having a set on my 545 though!