This has always been a fascinating sidelight to the Corvair story. Not all that many folks know how close all the other GM car divisions (except Cadillac) were to getting their own version of the Corvair. I'm sure it made some sense to help amortize the tooling costs for the many unique assemblies, but in the end Pontiac, Buick and Oldsmobile all opted out for their own compacts (Tempest, Special and F-85 respectively). Although those three compacts did share more of the Corvair's engineering than you would think, they were of course very different animals. I've seen photos of the Oldsmobile version of the Corvair, and of course quite a few shots of the Polaris exist. Don't know if I've ever seen any pictures of the proposed Buick version, though. Does anyone have any?
A great topic.