Thanks for the info people. Now, if I've calculated the cfm needed for my 261 w/ M4F cam, fenton headers, stock intake to be 307 cfm, a single 32/36 Weber properly jetted and advertised to flow 330 cfm should be fine. But somewhere I read that it flows less than that when rated like a 4 barrel. What does that have to do with it if it has a published 330 cfm and its being used on a 1bbl intake. Man I'm dizzy!!
