Needs Engine: 1969 Allis-Chalmers Terra Tiger 6×6 (opens in new tab)

Beginning in 1860 as a company that made milling equipment for flour processing, the firm that would eventually be known as Allis-Chalmers grew into one of America's largest makers of steam engines by 1900. Most of us know the company for its tractors and other farm equipment. This 1960s/70s Allis-Chalmers Terra Tiger TT-10 can be...