Gas filler movement??

[mazspeed]

Hey guys, I'm in the middle of a decision. I have a 67 camaro that is being built up and it goes to paint this week. I have the opportunity to have the fuel filler cap moved to inside the trunk, so when you fill it up with gas you have to open the trunk to do it, and then they were going to fill it up with metal fab, and give it a clean look. I have seen this in a few magazines before but wondered what are the dangers if any, and would there be fumes in the car?