Won’t start

Anyway. The 1850-3 probably has a externally adjustable floats and fuel level sight plugs on the side. If so, with the engine off unscrew the site plug on the primary bowl. Fuel level should be at or just below the bottom of the plug. If you don't see it, get small flashlight and/or gently rock the car to see if sloshes up enough so you can tell its there.

Then you know fuel in the bowl is not an issue. Move on to the next possible cause.