Lot #657.1 - One of the rarest options offered in the beginnings of Corvette racing was RPO 684 that was either an Air Box or Forced Air Ducting with Big Brake and Special Steering and Heavy Suspension. There were only 51 well connected individuals lucky enough to obtain one of these 1957 race ready Corvettes. These options could also be ordered with the car or bought over the GM counter at a very limited supply. This car has vintage correct Big Brake and Heavy Suspension and Steering options that only a few were able to obtain. The Big Brake Suspension and Steering on this car has the correct finned drums with the correct screened backing plates with mounting holes for the air scoops or elephant ears, complete with new 8 coil front springs and 11/16 sway bar and quick steering adapter. To finish off what Chevrolet knew would be one of their best racing performers was the famed 283/283hp Rochester Fuel Injected engines. This matching numbers car has a correct casting number block, cast later than the car was built, correct casting number and casting date coded heads, correct matching numbers plenum or dog house, correct fuel and air meter. This combination is mated up with a T-10 BorgWarner 4-speed and posi-traction rear end. To finalize Chevrolets race ready look GM combined the 5.5x15" wheels painted silver when you selected beige interior with the small hubcaps and black wall tires. This radio delete and softtop only car makes it one of the rarest race ready Corvettes in the day.