I dont like hearing this... i have been having fuel percolation/vapor lock issues... never had them before installing cam, lifters, cleaning the engine (internally). Added 1/2in spacer as well...
Hot vegas heat, hot asphalt, hot engine bay and the carb doesn't get the fuel.... my car has maybe 50 miles since the new parts all installed because percolating/ vapor lock issues.
I'm looking at adding an electric fp and running a return line as I dont know what else to do.... I'd love for you to share your wisdom with a young grasshopper who just wants to drive his car again lol. I really don't want to drop the gas tank in my garage for a the return line though.
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Looks like your braided gas line is running too close to the front of the cylinder head, braided covering is probably picking up more heat than it is helping.
Try running a 5/16" steel line up from a factory filter at the fuel pump up to your carb. Then splice that in with a short gas hose at the carb. Or if you can get the right fitting at your carb run the steel line all the way into the carb.
Run the new steel line on the front side of the fuel pump to get it away from the heat of the head and header that is boiling your gas.
