[jlb169]

Plugs new, wires new, carb new, rev limit set at 5200, if the neighbors kid is stuck I'll kick his ass out for gettin the car dirty. We've narrowed it down to vacuum. floats set ,jets are 80's(holley), timing and valves all set to factory spec. can't get rid of the popping in the exhaust when you stand on it. Mallory site says to backoff the allen set screw in the vacuum advance to two turns and adjust from there. Thats where I'm lookin for guidance. Thanks!