carter afb: fuel disappears?

if yours is Thermoquad the plugs in the bottom of the float bowels can leak fuel into the engine the only way to fix is to epoxy the plugs

When I use to rebuild them back in the day, the fix was a
small foam gasket called a super gasket.
It was fitted in the recess at the plugs and was pressed against them
when the butterfly plate was drawn down.

Found a link for ya,

http://quadrajetparts.com/rochester...condary-metering-well-super-gasket-p-120.html