Disappointed magnum head flow numbers....

My magnum heads were 215-219 stock and 242 @.500" after porting on the intake. Exhaust were surprisingly good at 163 stock and 180 after porting. All at 28". I will the casting quality between the 2 heads were very different ends of the spectrum! One was a nice smooth finish, the other was very rough. Both gave the same #'s in the end though.