One carb not drawing-what's up?

[Eljaro]

I would take the valve cover off and look a the valves and the rockers. If the leakdown test is ok but the compression is low you may have those valves not set right.
When you check compression you should have the carbs throttle plates wide open, otherwise you will not draw enough air into the cylinders.
You can also be having a bad seated intake gasket and the engine is drawing air through there.
You could also have you linkage not set right. Check that all carbs have the idle position set by the linkage and not by the individual stop on each carb.

[Eljaro]

I missed a few posts and see that the mismatch on the compression was effectively the not WOT position of the carbs.
If you have fuel around the base it is because the fuel dumped into the throats is not drawn into the cylinders because of the missing vacuum and stay on the throtle plates dripping down slowly and wetting the base gasket.

The manifold intake gaskets,especially the ones from felpro with the print-o-seal bead move when you tighten them down, and often slip out of place allowing air to be drawn from there. There might be no gasket now between cyl 1 and 2 and both cylinders may be drawing air from each others intake runner.