What heads for a turbo'd bbc
 

I posted in the bbc part but Im not getting any response. I have a 468 that Im going to put a pt-106 single turbo on. Im trying to get between 1800-2000 hp. I have a set of brodix BB2 plus CNC heads which have 320cc intake runners and flow around 370 cfm, they have 2.25 intake and 1.88 exhaust valves, but Im wondering if they are big enough or if im going to be choking the air flow cause they are too small. If anyone knows someone who has a bbc and has done this I would appreciate some input.