These were discussed earlier. I know the thread is long but it’s in here. To re cap…
Ported or not, the OOTB Victor head is currently 2K and change.
Porting is extra of course…. But the stock flow is about the best OOTB there is.
W7-8-9 will out flow the Victor or at least should. The W9 was advertised by MP as a OOTB 300 cfm head.
That’s what the basic deal is and even though the OP has s just knowledge searching, it bears repeating, use of these heads should have a well built and prepared engine under it and camshafts that make these heads sing beautiful songs are not small. You could get away with street cams, but I’d question why.