Thermoquad race tune

LOL, OK then. When I made the thick gasket mention, it was to add in an item that helps control heat to the carb which will produce multiple positive things.

Will it solve the mysterious disappearing gas issue? More likely not by itself. But! If MoPar used a thick gasket, there's good reason for it. If the carb see's less heat, then there's less heat after shut down. Keeping the fuel cooler will help it stick around.

I noticed earlier you mention capping the vents. Inside the air cleaner it is not a good idea. They are there to provide a vent to the bowl. Gas will escape from there but it should not at a rate of a dry bowl the next day.

There is also the tube on the drivers side that may not be sealing. That may be capped.

The only place I can think of fuel escaping is a cracked bowl or jet well downwards into the engine.
Floats adjusted well/right?

After this, I'm stumped.

Good call on the gasket... ill pick on up and try it soon. ill check the drivers side tube too.