I have several of those kits, and when I built mine, I did it as a phantom Z16 convertible. I never liked how they did the roof. My first car was a 65 Malibu, which was a mess that never got to what I da n Ted it to be. A lot of years ago, I. built a R & R Resin 65 Chevelle Malibu SS trans kit that was mastered from a 65 Craftsman body with an open hood and underhood detail. At this time, I have a Craftsman built up 65 Malibu SS in my collection to be restored. I plan to correct the roof of the Revell 65 to build an accurate Z16, and maybe a Malibu or 300 Deluxe from my other kits.
As far as your build goes, make it what you want. One day in my travels, I saw a beautiful white 65 Chevelle street machine. It had a nice stance. A set of modern 18" wheels, a trick interior, and a healthy small block or LS Motor. They make nice street machines