Dave S - think what Randy is looking at is not only a compound curve, but curves in multiple directions. Without a decent template, even an old rusty one, gonna be tough. I've stood in back of a lots of '37s as it has always been my favorite '30s Ford and have seen some that in my mind are 'wrong' - and it just might have been that tail pan. I'd probably make up either a straight trunk floor or weld up something close as that tool box is outa sight, outa mind and just do the tail piece. I'll see if I have photos tomorrow when I get back to the desk top 'puter with my stash of photos and maybe I can find a good rear view for a comparative look.

37 tail pan.jpg