Danny Ashley, if he is still doing carbs, has a great top gasket with a brass mesh epoxied into the bowl vent area and at a very reasonable price. He does sell parts, or did, and is a great guy to deal with. Can't find his card right now, but this info was online :-
Q-Jet Performance
765-674-5102
M-F 3:30-7:30 PM
ashley74@comteck.com