The 1969 Buick GS 400 Stage 1 was a limited-production powerhouse. This two-tone blue example will soon cross the Mecum Auctions block at its Glendale event.

Buick was on a winning streak at the end of the seventh decade in the closing century of the past millennium, with almost 652,000 cars. The GM high-end division had leaped immensely in the sixties' ...