Dearborn Steel Tubing built 21 Mercury Comet A/FX cars for 1964, each with a NASCAR-derived 427 High Riser rated at a deeply understated 425 horsepower, fiberglass hood, fenders, doors and bumpers, and Plexiglas windows throughout. At roughly 3,200 pounds they ran 11.3 to 11.6 at around 125 mph. Dyno Don Nicholson, Ronnie Sox and Jack Chrisman all drove them. Read on for what separates a documented original from a very good tribute.