slant window windshield won't close all the way

[jbc]

Good afternoon, I'm reassembling my S/W four door after painting.
But now the windshield is hitting the sill above the tank. This sill is bowed out but the windshield is straight and it's hitting the top edge ow the sill. Bratton calls this sill the ( windshield to gas tank filler trim. page 121 in there catalog ) The only thing different from when I took the car apart to be painted is the gasket above the hinge. I bought this gasket from MAC's. I don't have the original gasket so I don't know how thick it was. I can measure the one from MAC's. Has anyone had this problem?
Thank
John