Ford V8 flathead vapor lock

[Lynn Eades]

I would like to very simply clarify some things that Keith and Jim have talked about.
The ONLY thing that dictates delivery pressure in these pumps is THE SPRING.
Wear in the linkages, push rod etc. causes a drop in the delivery Volume. This problem will cause the engine to die under load, having idled well, and initially seeming O.K. (Because it runs out of fuel)

Now to the separate subject of vapour lock.

Some things that might help to prevent vapour lock;
Use steel tube instead of copper (less heat tranfer)
Try to minimise the volume of fuel exposed to the heat by keeping the fuel line between the pump and carb to a minimum length, (at the same time it must be clear of heat sources.
Have I not seen these (original) pipes lagged with asbestos?
Dont take any short cuts with any part of the cooling system. Make sure all the shrouding is in place
Use a MONO grade oil in these engines (more efficient heat transfer)
Use a quality gasket material at the fuel pump mount face (do the same with the carb)( to reduce the heat transfer)