Speaking of keeping it original, I finally tracked down the guy that had a 1967 Plymouth color trim book. I was able to take some dark blue convertible top samples from a supplier and do a hand held match to the 1967 swatch. Called to talk about ordering the top, and they threw me a curve asking if I wanted the curved glass as they came with, or the flat glass replacement.
I found and talked to a member here last night, who worked 30 years for a glass supplier for Chrysler....what a wealth of information. He said that 1967 did come with a slight curve. He said the replacement was a little smaller, flat, but fit the glass holder better. This car will never see the rain so might go flat. Not looking for the 1000 point car.