My suggestion is to stay away from the Edelbrocks unless it's just a street engine. Their flow numbers aren't that great as they were designed as a general performance replacement head and not a race head. If you want the big flow numbers stick with W2's or the large port Commandos. The LPC's are very close to the W5 without the special intake manifold and can be ported to come oh so close in flow. The B1 BA's are OK but the LPC's I believe are better. What ever you do stay away fromt the Brodix B1 BA MC (moved centerline) as everything I've heard about them is they don't flow well at all.