These cars evolved thru production and many things changed. It is hard to identify when (if logical) items were upgraded ( rear fender gussets, 1 or 2 piece seat, rear defrost, dash configuration [there are 3], rear rim width [ 7.5 vs 8in] , magnesium or aluminium rims, Ferrero variation on steering [all leather or all wood, or dished], different spare tire hold down, very early cars have steel wings and hood, very early cars have 289s.
Unfortunately as we have seen the paperwork go trashed when the scrapped the filing cabinets and no true 'Marty' style reference exists.
