When I replaced the header in my '31 Tudor a few years ago, after putting everything back together the bottom of the windshield dragged heavily on the gas cap. I finally put some serious effort into tightening the hinge screws and that fixed that problem. They probably turned in just about 1/16 of a turn each, but that was enough to fixt it.
It still doesn't close like I'd like it to, but that can be another project sometime.
Regards,
Evan Lewis