Thanks Von for the ideas

Yes, It's sounding like there are some significant differences between the 715 and 725 parts in this area.

The 725 windshield and windshield mounting frame are all permanently connected/welded into the ambulance body and ambulance upper cab. I think the cowl does have the two unused pivot holes for the 715 hinged windshield frame, but these are concealed behind the riveted transitions.

I'll try to download and post some photos tonight that show those same areas you photographed.
Bryce