When I had mine(long ago) Kenny Lazari from Indy told me to jet them 113 square. I didn't run the manifold very long so thats how I left them. I always wondered why you wouldn't run larger primarys than secondarys due to the metering rods. The other thing I thought about was this. With the boosters being different sizes could they require more or less fuel to obtain the same fuel mixture in the primary and secondary sides? How about high speed bleeds to talor the entire fuel curve? I'm always looking for more info ontheses carbs. The new motor is 572,15-1,-1 heads,440-25 intake. I have both Cater Comp 750s and Eddelbrock 750s.
Doug