In addition to the Cosworth Vega engine, the H platform served in the development of several advanced GM engine designs. In 1972, a prototype Vega powered by a 302 cubic-inch aluminum-block V8 (derived from CERV I) was tested, but did not progress to production.Hot Rod magazine-July 1972 While the Vega served in its development, the GM-rotary Wankel engine (GMRCA) was intended to be a key feature of the Chevrolet Monza hatchback and its counterparts; following its 1974 cancellation, the GMRCA was replaced by 262 and 305 cubic-inch Chevrolet V8s.
