[Alex Blair (RIP)]

Phil....
That is a good point when you said....

When my brother started playing with flat head Ford V8s he found that they really did like to vapor lock or boil the fuel line he tried the same fix but didn’t completely cure the problem so he added a return line to fuel tank using small tubing. In this way the electric fuel pump back at the tank could purge the line of any vaporized gas in the fuel line.

Actually the small return line give the fuel a continuous path and the electric pump a continous load..
It must be sized that it won't starve the carburator under extream load ..It must be after the electric pump and before the carb....
With out that return line when your float needle is closed the electric fuel pump will dead head and eventually burn out the pump motor..

This was a problem on the forum a few years ago.and I mentioned that the addition of a return line would eliminate the burning out of the fuel pump..I think three pumps met their maker before a return line was installed..I think anyway..Memory plays tricks some times..