Jerry, in your formula to calculate the maximum cfm, what figure do you use for the rpm? Is that the red line rpm? For example the 216 ID plate says it puts out 85 horsepower at 3300 rpm. Would 3300 RPM be the figure used in your formula? And I'm asking this because I'm working with a friend who has a Chevy 350 in a 72 blazer. He has a 600 CFM Edelbrock on it. Model 1406

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)