I think "Old Bill" has the best knowledge about this era, and I'm happy to agree with him - I don't think there was a third or even fourth HOW Sprint Car. About the 1952 McDowell Champ Car being cut down for the 1953 HOW Sprinter, that's an often repeated story, so there must be a kernel of truth, but generally I see two different cars. Maybe they used a few leftovers from the McDowell wreck, but it can't have been much. The McDowell wasn't damaged beyond help from the pictures I've seen, but it was said to have handled very badly, so perhaps they cut up the frame to use the tubes for the frame of the Sprinter - not the same as "cutting down", the way I see it. This car debuted in June of 1953 as an unpainted and unnumbered car for Jerry Hoyt, and soon became the HOW #55. Eddie Sachs drove it as #18 in '54, then Bobby Grim, Tony B. and Sachs again as #2 in '55. Elmer George took over in August of that year, and apart from a short stint by Don Branson in early '57 ran the car until the "Tony's" was built, and the further history as per "Old Bill". I think Bob de Bisschop did this car over in the winter of '55/6, but it was always the same old car.