FYI.........The Victor heads with the machined max wedge openings do not flow any more than the standard port openings. From maybe 10 years ago, here are some OOTB air flows.......one Edelbrock RPM and two standard port Victors..........
Lift............RPM...........Victor..........Victor
.100...........73..............68..............68
.200..........148............141............129
.300..........209............204............190
.400..........254............246.............243
.500..........276............277.............290
.600..........287............305.............315
For a 509 style cam I'd rather have RPM heads.