Challenger Filler Tube

I am restoring a 73 Challenger that has had the trunk replaced. The one thing that the new trunk does not have is the cut-out for the gas filler tube through the trunk floor. I will need to cut a hole for this, but does anyone have the measurements for placement/size,etc for cutting this? I would like to cut it before I install the new gas tank.

Thanks for any info or advise...

Larry
Author: BuckeyeCuda