69 dart 225 1bbl...fuel dumping

:banghead: fuel dumping....so it want s to run but by the time 3-4 rotations its flooded for the day...holley #1920 1bbl...got float very low..,needle moves freely..the consensus is fuel pressure ..can I do it with out it running?....between pump and filter I put a cut off valve to manually control pressure...got fuel line about 65% restricted ...visibly not flooding as bad but enough to flood engine... same problem even with new carb...happened out of the blue 2 weeks ago....Oregon coast, vapor lock maybe ??