Post by racer35 on Feb 19, 2020 8:43:36 GMT -5
going to put a different cam in my play truck, just gets used for two tracking and messing around, truck is a 1979 k20. My question is i have a set of 624 and a set of 193 heads and was wondering which set would be better performance wise. I know vortec and aftermarket heads are better but im only wanting to use what i already have.
