Dropped axle axel straight axle Drop lower I-beam I beam no tube old school traditional patina hotrod ratrod 1925-27 1928-31 model A 1932 Model B 1933-34 1935-36 1937-40 1946-48 1948-52 F-1 F1 1953-56 F-100 F100 Fat ender 1957-60 1961-64 1948-54 C3100 C 3100 1st series 1955-58  2nd second series droppedaxle.com low rider slammed down in the weeds Axels Chevy Chevrolet Ford Dodge Studebaker International Harvester Kingpin king pin hot rat rod street coupe sedan roadster pickup truck stretch E100