Yeah something is definitely amiss. This is the second year I’ve had this issue - I parked it w/o troubleshooting it last year. The water pump swap this year was me trying to kill two birds with one stone.

The fuel line is routed in the frame rail which certainly is close to the headers and the carb feed line up from the pump is routed up by the alternator. That’s probably not helping the situation.

I’ve considered adding a return style fuel filter off the pump to return the vapors back to the tank. This certainly would work but I’ve been lazy and not done that yet. And I’m not 100% this would solve the gas literally boiling out the carb. Idk.

The cheap and easy thing to do seem to be add insulation and a heat shield under the carb.

Good idea on the IR gun!