Originally Posted by Cab_Burge
The top end of any motor is the stopper or the best way to make more power with little heads, carb, intake and exhaust along with the cam is to make all of them bigger to flow more air and fuel up
You can make 500 HP with the correct good stock type heads and after market intake, carb, cam and exhaust on pump gas pretty easy work
With better heads and the same other parts you can add from 20 to 100 HP more shock up


I just figured those RPM heads would flow better out of the box than the stocks..