When I first broke my truck in the only thing that slowed me down was when I forgot to crack it a little bit. And flooded once right before my first slow pass from a fouled plug.

Have you tryed to prime her then take the head off and see if it's getting wet? Only thing I can think of right now with the dry piston. Unless your getting fuel running into the exaust from the air line. Then you might just have a clog. Have you tryed to get fuel or air in the carb right where the fuel goes into it to see if everything is lined up right to flow freely?