1940 LaSalle Convertible Sedan. Cadillac saved the best for last, and few would have guessed from the 1940 models that LaSalle was near the end of its road. Wheelbase was now lengthened to 123 inches, and horsepower edged up to 130, thanks to a larger carburetor. Styling, an evolution of 1939, was hard to fault, and there were now two mod…