[Superman]

By exhaust leak I mean air getting past ann exhaust gasket, such as the six that are between the heat exchangers and the heads, or between various exhaust pieces. Every single time I have mentioned exhaust popping to a mechanic, the mechanic has assumed there is an exhaust leak. One caveat is that some of my fellow Board members are certain they have seen exhaust popping caused by other reasons.

Carburetors do wear at the bore that the throttle shaft goes through. Grab that throttle shaft and wiggle it.

Torn Accelerator pump diaphragms make a car hesitate when you open the throttle if there is only one carb. If there are multipe pumps, then one torn diaphragm would probably just make the car run poorly. I know nothing about triple-throated Webers, but I have been told they lack accelerator pumps.