A few days ago I started the 428 car. Once it fired it wasn't but about ten seconds until it started running rough and died. Upon checking the engine I noticed the carb had fuel coming from the rear bowl overflow and also the front hole in the metering blocks. I checked and cleaned the shutoffs and the problem is still there. I'm now wondering if the fuel pump which is stock and original is putting out too much pressure and forcing the seat valves open and causing the overflow. Also I checked the floats and they are OK. Not sure what regulates the pressure in these old mechanical fuel pumps but there has to be something. Anyone else had this issue and how did you solve it. I don't have a fuel pressure gauge but may be able to rig something up.