By the time this 1969 Buick Wildcathit the showrooms, the nameplate had undergone quite a change. Introduced in 1962 as a sub-series of the Invicta, it was poised to do battle with the likes of Pontiac’s new Grand Prix in the new personal luxury coupe genre. Where the Grand Prix really took off, the Wildcat went down a different path, branching out to a full lineup of two- and four-door hard