so far as the list, i would say that it's not titled very well. it's probably a good representation of the major performance models of Buick in various eras.
i mean, really, they're not going to have the Y-Job / Le Sabre / Blackhawk concepts or the prior mentioned Riv on there? you can kind of get away with that kind of thing if you're restricting it to 'performance' Buicks.
they've already included special built race cars ( 1910 Bug ), so there's no excuse for selecting the GSX in place of the concurrent Stage 2 GS.
the 2012 Regal is only on there so they can try to tie this into marketing for something halfway recent.
the only way the 63 Special makes the list is due to it's aluminum v8 being the basis for two F1 championship engines in the 1960s. but that was introduced in 1961 AND went through Olds and Rover before it got to ( Australian ) Repco Brabham. the Buick stock block also did well at Indianapolis. but hardly anybody even knows about that engine ... and the news story doesn't include a blurb on it. so what's the point?