1959 Cadillac Cyclone XP-74 Harley Earl's last dream car, the Cadillac Cyclone reflected America's fascination with rocketry and space. The engine was a 390 cubic inch V8 rated at 325 horsepower. The transmission was a three speed Hydra-Matic, which when coupled with the two speed differential, resulted in six forward speeds. Right: As originally built the fins were more prominent but were revised after Mr. Earl's retirement.

Door and top operation were unconventional.