u would be better off with an extra vent , instead of no vent ------a new 68 fastback would boil over while filling , used to really piss me off. I used a cr113 tank off ebay, with a standard vent hook up to the filler tube , and an extra that comes out along side the fuel pick up tube , ran it around and up thru the trunk, 2 coils and back down thru the floor , has never puked on this car-------------jfi
