I think cams designed for crappy exhausts would work with any crappy exhaust.
Yeah we're not going THERE, but we'll take you through, step-by-step, how today we got to 473 lb-ft & 449 HP staying UNDER 8:1 compression.
Torque curve is flat as a table top from 3000 rpm to 5500 rpm and never is lower than 421 lb-ft.
It's still making 431 HP at 5800 rpm.
These low compression motors just wont make any horsepower will they?