Adding a vapor line to your fuel filter

I wouldn't think it would eliminate that. That's normally caused by the fuel in the carburetor getting too hot or the fuel turning to vapor in the intake manifold. The latter of the two there's not a lot you can do about. But if the fuel is getting too hot in the carburetor, you can run a thick insulator gasket to mount the carburetor to the intake.

But wouldn’t that 1/4 outlet allow the fuel pressure to vent back into the tank instead of having it stay in the fuel pump and line to boil after shut off?