which Barry Grant carb
this is a question for tech guy @ barry grant.
i sent all my engine specs into Barry Grants tech line, GMPP ZZ 383, and they suggested i go w/ their speed demon 650, w/ vacuum secondaries. i was just looking at the prices at Jegs for this carb, and i notice they have carbs setup for certain crate engines. i looked and saw they suggest a 750 for the fastburn 385. GMPP used a Holley 750 for their testing and HP and torque ratings. i just checked, and both engines have the same heads and cam, only mine is 383 ci and the other is a 350ci. so why does Grant suggest a 650 for more cubic inches.