Unless the inner walls are warped. I’m not seeing how it relates to fuel running out of the linkage
With the Rochester B and BC, fuel can be coming from a few different places and running down to where it drips off the linkage. If your top (air horn) and float bowl are warped, the gasket will not seal. When this happens you can lose vacuum inside the carburetor (will disable your power circuit), and you can have a situation where the fuel sloshes up when you turn a corner or go up/down a hill to the point where it just runs out the seam. The air horn is only connected to the float bowl by 4 screws and over time heating/cooling causes warpage. GM knew this and why they never solved the problem is not known, but they didn't. If your float/needle/seat are not working correctly that will also cause leakage...especially if your castings are warped. And if you have a pump with too much pressure, this will cause the needle and seat to work incorrectly or fail and this will cause leakage.
