The '57 Chevy tank fills from the left rear corner. On the Chevy the filler neck was behind the tail light. On mine I put a 90 degree bend facing up. Then made an access panel (4" filler cap) in the trunk floor. It fills from the trunk through the access panel but but the filler neck isn't connected to the trunk. The 90 degree filler neck has its own cap. Hopefully this will pass NHRA tech.