If the AFB equipped jalopy will be sitting for a prolonged period of time, put some light oil, like Marvel Mystery Oil, in the float bowls. The AFB's do have those large square hole bowl vents on both sides, next to the covers for the metering rods. Makes it easy to give it a good dose. Started doing that after disassembling these carbs that sat and evaporated the fuel from the bowls, which left some scaly white nasty looking deposits. Attribute that to the corn juice gas additive!