X, J, or 308?

hi the one thing you all are missing , is port velocity. it is way more important over the big flow numbers. when I went to a super flow class, it was stressed, port velocity and port shape are everything, don't get hung up on big numbers. there is a window of valve open and close, if you have big number , but low velocity, very low cylinder fill. higher port velocity will put more air into cylinder. in stock class racing, we strive for port velocity, flow numbers do come into play. just food for thought.