I would have to look it up again, but the 4/4 continued after 1997 with the narrow chassis and long doors. Can't remember the exact year it changed but the 4/4 Sport of the 08 era was the same chassis as the Roadster.
1997 Mogans spanned the changes which were not implemented as a big bang. So early cars will be short door. Late cars will have 'all' the changes. Those mid year will have some but not all. That's how it was rolled out. No master plan.
