yes, the carb.
The gas gets hot, and percolates, then boils the bowl over, and gas overflows and runs out of the lower linkage all over the hot manifold.
I got rid of the Rochester B, and replaced it with a rebuilt Carter YF, and added the spacer/insulator, too.
It doesn't do it all the time, but enough times to bug me.
What possible remedies have been tried?
Suggestions please?