I went back and read an old thread from Jim Laroy on FBBO. He tested something similar. His torque and power numbers were down quite a bit from what EM had stock. Jim used the smaller Summit cam (6400) and with headers and a 750 carb Jim had 432 ft lbs @ 2500 RPM and 297 HP @ 4300 RPM. Maybe it was because Jim used step headers. Jim if you're reading this did you have accessories on that engine?

With the 509 cam and M1 intake Jim made a similar HP number (387) at 4900 RPM. I guess 4900 RPM might just be where the stock heads finally choke you out no matter where you put the IVC.

https://www.forabodiesonly.com/mopar/threads/dyno-testing-a-stock-1972-440.249866/page-2

Last edited by GTX MATT; 01/07/20 05:19 PM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street