I’ve only had one set of SB Victors here.
An early set, bought “bare”(no valves or valve job), that were sent to me to have the valves fitted to the guides and the seats cut.
I was pretty impressed with the flow.
Very quiet and steady ports.
The numbers I got are in the SB air flow thread.
Another option……..Indy 360-2 cnc230’s are in the 320cfm range on my bench.