I am new to the forum. I am struggling with the qtr. window on my 1949 98 convertible. I replaced the window cylinder that was leaking and cannot figure out how to reinstall the window and regulater. Help. Michael.

 

You may find the info you are looking for in the Fisher Body Manual .
The 1948 book should cover 1949 " C " bodies as well . They were pretty much the same .
1948-1949 Oldsmobile 98 Fisher Body Repair Manual Olds Shop Service Book | eBay