Does this sound right

273 said
The heads have just as much to do with peak rpm potential as camshaft, I'd even say more so.

IME it is the cross section AND the shape that dictate 90% of where peak power occurs. The other 10% are camshaft AND exhaust in conjunction with each other. I've seen an NA 1st Gen Hemi with a cam and only 220 @ .050" peak at 6700 RPM. J.Rob