stock pump return line help

prob on maiden voyage i started cruisin and 10 min later my brand new holley carb starts blowing gas past the seats out the top of the carb. i am running with no return line, can that cause it when it gets hot. the fuel filter is that p.o.s. glass one that i will not use much longer but the gas seems clean so no dirt stuck on the seats. anybody know if the stock fuel pump requires a return line i heard that they do have a blow by in the pump itself but causes it to heat up the gas and vaporize it.

i planned on waiting for it to cool off but that didnt work it still blew right out the top. can anybody recomend a good 3 way filter for the return line.