[ford38v8]

Greg, it’s hard to diagnose while blindfolded. Tell us more, be specific with correct terminology, and we can help. Identify engine, carb, distributor, fuel pump, and whether you have an in-line fuel filter. From what you’ve said, vapor lock, float bowl, and vac leaks are not related, early & late flatheads differ in vac brake or vac advance. Wild guess tells me your flex line and/or fuel pump are your root problem.