Fuel Leak all over intake manifold

You can have a leak in the accelerator pump diaphragm and still have a good strong accelerator pump shot. The diaphragm's back side is exposed to the rod hole in the back of the pump area, and a small pin-hole leak in the diaphragm will leak out of there, but the diaphragm will still be substantially intact and be able to push a full shot into the carb throat. So you have not eliminated a pump diaphragm leak yet. This was exactly the type of a leak like I had in my 1920 carb. You have to pull off the bowl and then remove the jet assembly to check the diaphragm.

And, yes the bowls get warped/distorted so that is another potential source of leaks. If you did not use any sealer on the gasket it ought to come off intact; if it is cork, it might shrink when it dries. I have been threatening to try Permatex Permashield 85420 the next time I need to put on a 1920 bowl gasket, but have not used it yet, so I am just pointing you in a direction that might work; it is gas and oil resistant (not silicone). There is no real pressure on the bowl gasket so that helps. (Follow the instructions to let it dry for the solvent to evaporate before assembly.)

I alos have had issues of the bowls screws loosening up a bit; have not tackled a thread lock for that, but will probably try blue Locktite, or a small amount of #1 Form-a-Gasket on the threads if that does not work.