fuel pump push pull question school me

Sounds reasonable. My 60's carbs have a vent on the top of the bowl, with a lever that opens a rubber disk to vent at idle. Later ones ran the vent to a top tube (to charcoal cannister), but have a similar valve that opens at idle. Before you go to the trouble of running a new tube, try just unplugging your vent. It won't spew gas unless the bowl overflows, and an old 60's carb would flow it out the vent too. Instead of a tube, maybe put a little air filter on it (to keep out bugs) and run a plastic hose below the engine in case of overflows. My M-B's have those on the vacuum vent lines. Look in the bubble packs at auto parts.