Filler neck relocation

I know that the early 70's (71-74) Satelittes, GTX's and Road Runners all had the filler behind the license plate. Always seemed to slosh fuel out of the filler when accelerating with a half full to full tank. I suppose a well sealed cap might prevent it, but i know from talking to many who have owned them, it was a bit of a problem. With todays fuel prices who really wants to be dumping fuel out the back every time you accelerate?