His plan was to build an open top Porsche-engined racer for customer teams. Porsche eventually built such a car nearly a decade later, although the WSC-95 would never be built for customer teams as Holbert and Porsche intended.
Holbert's idea was to create an open-top Porsche-engined racer for customer teams.  Porsche ultimately built such a car about a decade later, but the WSC-95 was never intended for sale to customers as Holbert and Porsche had planned.