Minimum electric fuel pump pressure

what material is your carb spacer made of, and how thick? I hope not aluminum, I use the 1/4" thick edelbrock gasket. like replica said-more fuel is probably not the answer, the fuel bowls are not boiling over completely, test this by removing air cleaner and pump carb a few times, it will probably squirt and take even more air to fire up. and just for info, that carter pump would be good enough for your mild combo