Your link took me to my webshots page.
The winshield in the military trucks had brackets on the sides of the winshield and no center support. The windshield was pushed out by hand to the desired degree then knobs tightened in a slot to hold it there. Could it be the mount holes for the side brackets are on all of them and covered by trim on civilian models? Or maybe yours was replaced with one out of a military model sometime in the past.
