The 2G has a couple of drive plugs, but they rarely, if ever, leak. The early Q-Jets (1965~1967) did leak at the well plugs, and the foam gasket helped the mind of the rebuilder, not the actual leak wink

There are now excellent "fixes" on the market or repair the 1965~1967 Q-Jet well plugs.

Rochester fixed the problem in 1968, so no need to worry about the later Q-Jets.

The fuel simply evaporates from the bowl vent.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop