afb 4131s surge at wide open throttle

A couple of things to think about. The previous Holley that worked OK- how do the main jets compare to the AFB? Could the surge be in the transition from primary to secondary? Maybe the primary is too lean. Just a thought.
Previous holley dp 4777 has 67 pri and 76 sec jets. anyone know what these jets would be equivlent to my carter afb 4131s with 89 pri and 82 sec?