Most aren't building an engine capable of testing the limits of Edelbrock, Speedmaster or certainly Trick Flow heads.
I'll bet most guy's haven't even came close to an honest 450 HP.
Max effort on there stock flow should be like 625 hp.
The average guy is making 1.1 to 1.25 with some getting up to 1.35 lbs-ft per cid and 1.5-1.9 hp per cfm, I realize that most of ideas like this are for serious engines running 7500-9500 rpm making 2-2.5 hp per cfm and torque per cid in the 1.45-1.65 lbs-ft. Far from the engines we generally talk about beside the pic of the one your always posting the 1350 hp @ 7500 rpm :)