Thanks, great conversation guys. I will be doing the carb spacers and isolate the fuel log as well. Seems as though that worked for Kieth in 100 degree Texas, so it should do me OK in 98 degree Maryland. Why didn't I think to check the mechanical fuel pump, good idea! I do have an electric fuel pump that I originally switched from the dash, but moved it to a micro switch on the carb linkage so it only kicks in at full throttle. Not much help in that configuration for vapor lock. I will move it back to the dash. Thought about changing the whole induction system, but even though I am not into strict restoration/preservation, to me the dual quads are part of the character of the 67 GT500. If I were to do anything there, it would be to save the original system for the next owner and install a more modern, maybe smaller CFM, dual quad set up.
Hey Keith, if you can find those part numbers, it would be a big help.
Thanks again to all,
Charlie D