The global success of Shelby Cobra inspired many American race car builders to build a similar car that could compete on an international level. From this perspective, nobody came close to beating the Cobra, but Bill Thomas, a famous Chevrolet tuner and race car builder, was a serious candidate (via Car and Driver).
A unique lightweight chassis was featured along with a small block V8 moved as far back as possible. A light fiberglass body covered all of this. Despite some overheating problems, the Cheetah was a remarkable performer and won some lower-rank races and even the 1968 SCCA championship.