I don’t think you can. The shell is curved and glass windows are designed to be installed on a flat surface. Sometime in the mid-80’s
Scamp reshaped the upper shell to create the necessary flat surface for a rear glass slider.
Scamp attempted (c. 1976) to put a glass
awning style window into the original curved shell by bending the frame slightly. They leaked, and Scamp abandoned the windows after a year. Those are the ones Eddie was referring to.
See this current thread:
https://www.fiberglassrv.com/forums/...ows-98115.html