So you want to go racing, but maybe you don’t have time or inclination to build a car. Ford Racing has your answer: the Mustang FR500S, a production race car you can order through Ford dealers. To go along with, is a new spec series, the Ford Racing Mustang Challenge for the Miller Cup. The car is being built on the production line at Flat Rock, Mich., and has the 4.6 liter, three-valve V-8, which will be dyno tested and sealed by Roush Industries. The price of admission: $75,000. First year production is limited to 77 cars.