Engine availability in the 1975 Corvette dropped to the lowest number since 1955. In 1975, only the L-82 engine option was offered as a choice to the base L-48. With the deletion of the 454 CI engine, the 1975 Corvette became the first since 1964 not to offer a choice of displacement.
1975 was the first model Corvette to have HEI (High Energy Ignition) system. The HEI is quite different than the transistor ignition systems available on Corvettes for over 10 years and included the Corvette's first pointless distributor.