good article, those concept pictures are really interesting. I haven't seen several of them before. Although I think the article undermines Holden's customisation of the Opel(s) it was based on. GMH actually did spend considerable effort & cost into modifying the Opel into their own unique Commodore. A few significant points worth mentioning: The European Rekord was only fitted with a 4 cylinder, so it was discovered the bonnet would not clear the longer, taller Holden 6 without significant modifications to the bonnet profile. It was Holden's idea to stick with the Rekord main body, but fit the Senator longer nose to accommodate the Holden 6. Opel themselves actually later adopted Holdens idea with their own 6 cylinder 'Commodore'. You can see the subtle difference in the shorter front overhang on the Rekord compared to the Holden Commodore. Also, both the Opel Rekord and Senator were fitted with an inferior recirculating ball steering box. The local Holden V8 engine wasn't going to clear the steering box. So Holden redesigned the steering system with a modern & superior, locally developed Kirby Bishop rack & pinion setup. And although the article briefly mentions it, quite a bit of testing and development was put into the strengthening of the body shell. The test Opel reportedly broke in half during local testing. So extra strengthening was added including additional gussets on the body structure and a full rear bulkhead (refer image below). All this information and a lot more is included in the 'V-Car development' book. A really good read for anyone who holds the misconception that the Holden Commodore was basically just a 'rebadged Opel'.