Quote Originally Posted by Bob Parmenter View Post
Don't have any 28/9 closed car to compare to, and haven't ever seen any authoritative commentary. The best I can do is put a straight edge across the bottom of my roadster w/s frame. At the center it measures a nominal 1 7/8" to the bottom of the arch of the w/s frame without rubber.
Thanks Bob, that should help. I can trace arch of closed cab on cardboard, then mark the ends of roadster windshild frame, I have bottom width, and figure out how much arch there is. Thanks Again.........