I talked to a glass installer who custom cut the glass large enough to cover the entire pinch weld area, then glued it on with what they use on modern windshields (no rubber windshield weather seal). For the area where the two pieces meet in the middle, he used a clear sealant (no ss center molding).
You're referring to V-butting the windshield. I did the same with my '46. For the center, aquarium seal or marine silicone works great.
