Measure the throttle butterflies. The AVS came in 630 small and 750 large. The Edelbrock is basically a copy of them. There cfm rating cross over.Kim
I’m leaning toward the edelbrock performer rpm. I have the choke which sits in the manifold well and works off the engine heat. The carb I have is the 4 speed factory hi-po carter carb that came on the 67 hi performance 440. What cfm was that?