 Wouk's work with HEVs in the 1960s and 1970s earned him the title as the "Godfather of the Hybrid".They installed a prototype hybrid drivetrain (with a electric motor) into a 1972 Buick Skylark provided by GM for the 1970 Federal Clean Car Incentive Program, but the program was stopped by the United States Environmental Protection Agency (EPA) in 1976 while Eric Stork, the head of the EPA's vehicle emissions control program at the time, was accused of a prejudicial coverup.In 1979 the Fiat 131 Ibrido was presented in Detroit, a marching prototype made by the CRF (Fiat Research Center).