Put a '63-'67 next to a '68-'69 and you tell me which is the cleaner, more evolved design?
The split window was nothing more than a cheap Bill Mitchell styling gimmick. It was unique, granted, but did nothing for the styling. Take the split window away and you have a cleaner, better design, IMO. But still nothing like the '68. That was one slick looking 'vette. Best one ever, IMO.