h cooling system design, while the Bus and Beetle use and up-right fan shroud ... system. So when VW parts people, books, or parts ... , not just the long block. In 1972 the Bus switched to the gtype 4h engine. It ... designed in 1968 for and fitted to the VW 411/ 412, the fourth type of vehicle VW ... was used not only in the 411/412fs and Bus (from 1972-on), but also in the Porsche ... electronically fuel injected, while the Bus had twin carburetors. In 1975 the ... electronic fuel injection across the board. In 1976 the engine size was increased ...