I use to race NHRA stock class years ago when stock meant something. Back then the fastest SB Mopar racers knew that the stock OEM heads flow the maximum at or below .500 lift so they would have the cam lobes with the most duration with the max lift allowed by NHRA custom ground for there motors and use the LSA to run as fast as they could with that lift work
Back then Isky had the hot lobes for all the 340, 318 and 360 stocker motors, most ran the best with 104 to 106 LSA shruggy If I'm remembering correctly they all had less than .460 valve lift allowed at the retainers whiney shruggy

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)