Complex sentence: Kelmark gained a reputation as an innovator starting with V8 conversions for Beetles and Corvairs and produced a unique car for the time period: a V8-powered Volkswagen Beetle.
Split into simpler sentences: Kelmark gained a reputation as an innovator starting with V8 conversions for Beetles and Corvairs. They produced a unique car for the time period: a V8-powered Volkswagen Beetle.