Alternate gas cap location

Anybody ever change the gas cap style or location on their early A? I was thinking of welding in the recessed/concave fender section of a 68 Cuda and using the flip top cap. I don't want just the simple adapter as I feel the cap would stick out too far. I also had someone suggest putting it on top of the rear quarter, like a 68 Charger, but I'm not sure there's enough room for that. Who's gotten creative?!