Windshield Questions 71 Scamp

RichardR said
Rear windows should be cut out?

No... it should have a gasket like the windshield. Take the moldings off .... CAREFULLY. Don't bend them. There is a tool for it just to let you know to loosen up the clips.
GearWrench 2038 Window Molding Remover - Mutual Screw & Supply