deadbeat,
The basic answer is "yup".
Any C10-30 series windshield will fill your C50 glass need. Below is the way I used to confirm such info.
Searched the great Stovebolt info reference site
GM partswiki which provided the following info:
http://www.gmpartswiki.com/getpage?pageid=62597 (I searched using the name "Glass, windshield" and specified "Chevrolet medium duty truck" and the year "1971" before clicking on search)
An extracted and marked screenshot below shows the one-piece "clear" and "tinted" windshields used in
ALL 67-72 Trucks, except for the Tilt cab and P-models (Panel vans) which used a different 2-piece split windshield as noted in the search results.
Am sure that armed with this info you can source a good windshield.
Dan
