Re: Kids and carbs. Education needed.
The first thing I would attempt to determine, is if the problem is fuel or ignition.
Form what you describe, I think it could possibly be either.
Ignition coils, and ballast resistors can intermittently fail from heat, and Vapor Lock is usually attributed to heat also.
If no ignition, then adding fuel will not help, but will flood the motor, and sitting is the only cure. Sitting also cools things down so any potential Vapor Lock may go away also.
I also have a '56 GMC with the factory 330+ Cu. In. GMC V8. It suffers badly from Vapor Lock, after idling for 10 minutes or so. It slowly dies as though it rans out of fuel ( which is what Vapor Lock causes).
Once you know it is fuel and not ignition, then meaningful work can be done to solve the issue.
Keep us informed.
Rod J
Issaquah, WA.
401's and 478's
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