The ports on the HP heads John and I did are about 2.611" tall and there were no welding issues with the Victor intake. Ours have the pushrod holes re-located 0.500" and they flow over 400 cfm. Lots of work to get there.
The highest cfm numbers I personaly know of from a set of HP heads that did not have the pushrod hole re-located and without offset rocker arms is 382 cfm at .800" lift. They were not ported by KRE and those ports are about 2.650" tall. There might be others that flow more but getting people to discuss it is difficult, it's a very secretive group ! I know of another set without re-located pushrod holes that were done by KRE and they went 376 cfm at .700" and its port opening was about 2.500" tall.
|