69 Dart Hard to Start When Hot, Starts Fine Cold. Vapor Lock?

I have to disagree with your statement.

Go watch a few—or a couple dozen, or a few hundred—carbureted cars running with see-thru fuel filters, then come back and tell us what you saw. Or, shortcut: go lookit what people are saying about this on other-brand forums



The filter like the oil filter
Not quite, no. Similar idea, but different details in how fuel filters are configured versus oil filters. The air/vapour bubble taking up most of the filter volume is deliberate; if it weren't there, the carburetor would tend to flood a lot more and worse because fuel pump surge wouldn't be damped out by the "shock absorber" effect of that vapour/air bubble, and fuel expansion with heat would force liquid fuel into the carb.
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