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Brant I don't know what additional bracing is required but you are welcome to come by my house and compare my 75 vert to your 80.I live in Batavia not to far from Mason.
The A.I.M. manual for an early C3 Convertible should help. Also, some of the Corvette salvage yards may have the braces, or perhaps they still are available from the Corvette Parts Houses.
You are going to need new window glass, a rear decklid, etc. A lot of stuff. Good luck. Maybe you have a donor Vert to help out?
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