In repops I'm with Randy, have had a couple from Trautwein and they fit beautifully. At the time I got one for my Gibbon he made it to a template he had for the Gibbon, great fit. The one on my '36 roadster was a stock chopped to -2" which fit the 2" chopped stanchions exactly. If yours is a repop body he may have a template for that, ask.

As for attaching, on the glass 3 window we fabbed a header piece to attach stock repop hinges and make the windshield function like an origninal. Most folks will glue them in rather than go through the work..