The reason fuel injected engines don't suffer vapor lock issues is because of pressure...not the return line. Most late model injected stuff is returnless fuel injection.

another thing to think about is adequate venting of the fuel tank. i did some tests on some pumps and an original hipo 440 pump pulled 19" of vacuum. in fact it pulled more vacuum than any pump i tested. if the fuel supply system isn't properly vented high vacuum in the lines can contribute to the fuel flashing.

valid point But one cannot put 45+ PSI to a carbonmaker

If any of my cars sit long enough for evaporation to empty the carburetor I spray brake cleaner into the carb before cranking. Fires right up. Might have to spray it twice but it saves the starter.

I think its good to crank a while to get oil pressure anyway if the engine has been sitting for a year.

I sure would not recommend spraying brake cleaner into a motor. Brake cleaner produces poisonous gas when it burns.