 NASCAR changed the rules, however, requiring (instead of hundreds) thousands of production examples in service to qualify for the next season, and Ford decided against producing the Cammer in that quantity.Fears of liability concerns and the bad publicity possibilities in giving the public a car that was so dangerously powerful are often cited as reasons, but it might simply have been that Ford doubted that an engine so unsuited to street use could sell in such numbers.The 1964s represent a high point in early 1960s Ford quality, durability, and styling.