Gas leaking out of tank vent

[NovaSF]

Hello everyone. I have a LS3 swapped 70 Nova with a basic return style system. Noticed a little fuel dripping under my car today after a little drive. Appears it was coming out of the gas tank vent (pictures). I then opened the gas cap and a bunch of pressure blew out of the filler neck. Weird. The drips stopped. Tank is about 60%full.


Clogged vent where it allows pressure to build then puke??? Any thoughts???


Thanks!