<VV> Vapor Lock?

[Geoffrey Johnson]

This has already been accounted for in this thread by addition of a 
electric pump, but another thing that will cause supposed "Vapor Lock"  
is a worn fuel pump eccentric or a worn fuel pump push rod.    It will 
usually start and run, but once warm, the pump which is not getting as 
much throw from the worn parts will not have enough to keep going.  
Check to make sure the pump is getting enough throw.
-Geoff