If you truly have vapor lock try insulating your fuel lines from the tank outlet to the engine. Your fuel lines run forward with the exhaust pipes inside the frame rails. This creates very high temps for boiling you fuel! I cured my VL problem buy doing this on an old Bluebird with a 534 Ford gasser years ago. You can buy the purpose built insulation from Summit Racing or Jegs. Or if you have a doghouse, open it up and have someone pour cold water on you fuel lines! Worked for us! But got dammed hot in bus! Good Luck, Dave
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