Thanks Dave.
It's Edelbrock and I see no def in anything but name,but these AFB's are carbs I've messed with before,so was asking. I'll look up the Edelbrock site and try to understand it.
You know just when ya think your good at tuning 94 and 97's and 4bbl Holleys,along comes this to put me in my place.
I've run bigger carb CFM on a 312 Y 2x4 off a Cady El and had it work just fine.
Tryed all 3 setings of excellerpump holes ect.