If the sun visor is on the car, you must put the hinge on the windshield frame and install it together. If the sun visor is off the car, then you can slide the windshield frame into the hinge with the windshield in the horizontal position. It either case a helper is very helpful. Also, the gasket goes between the header and the hinge but many times the gasket is too thick and the windshield doesn't close correctly.
actually....yes I do need one.thanks for everyone's help on my w/s question. as it turns out, the w/s I have is for a 30 or 31 model A. anyone in need of one? It's in great shape - all painted, new rubber and good glass. Of course I'am now in need of a w/s for a 28 or 29 sport coupe. thanks again.