New fuel system for the Dart

Willyrd said
I'm sure your carb will be just fine taking 50psi of fuel pressure. No need for the regulator. In all honesty it sounds like you have a vaporization problem, are you sure the gas tank venting is working properly?

Yes, vent is working fine, can pull cap of while running and fuel pressure does not change. Nor does the cap come off with vaccuum.