The 1949 Hudson Super Six hid a genuinely clever piece of engineering under its conservative styling: a lowered unibody shell mounted over a reinforced ladder frame, dropping the cabin floor below the frame rails for a lower center of gravity than most full-size American cars offered. Hudson called it Step-Down construction, and it gave the Super Six handling that outclassed rivals from Buick and Chrysler. Nearly 100,000 were built in 1949 alone — one of the more underappreciated engineering stories in postwar Detroit.