The CoBra was under continuous development and was a good 60,000+ mile engine (if properly maintained) when it was abandoned for cast iron. CoBra engines fall into two groups. The early engines had straight cut tower shaft gears and a painted block (switch to spiral cut gear came before galvanized block). The later engines had a spiral cut tower gear and a galvanized coated block. The early CoBra engines had straight cut gears on the tower shaft/cam. Later engines went to the spiral cut gears to quiet down the valve train a little. Because of the thin sheet metal construction the noise level of a tin engine is still high, almost sounding like a diesel. Engine Type: 4 cylinder, Crosley CoBra (COpper BRAzed) Horsepower: 26.5 Wheelbase: 80"