I had a vapor lock issue with an '83 Trans Am with a Chevy 305 (carburated and mechanical fuel pump). It was a from-the-factory issue. It had to do with the routing of the fuel line near something hot. I solved it with a Holley electric fuel pump and an adjustable pressure regulator with a return line for the excess fuel. This solved the vapor lock by creating a constant flow of fuel going through the fuel line. I did not run the electrical through an oil pressure switch. I would have, had I known about it.
Bottom line: Don't fear a quality electric fuel pump with a regulator in a hotrod.
Carl
