This 1970 Buick LeSabre Customconvertible comes from an age where the then Flint-based manufacturer’s top selling vehicle was nota crossover/SUV. Good heavens, anyone who’d thought such a thing would even exist back then would have been locked up. Ditto thinkers who opined that Buick’s largest market would someday be China. Back in 1970, Buick’s lineup consisted of 40 diffe