Original sentence: The 500 was exclusive to the Eldorado until 1975 where the powerplant was available in all Cadillacs except for the Seville, which was powered by a fuel-injected Oldsmobile 350
Edited sentence: The 500 was exclusive to the Eldorado until 1975 where the powerplant was standard in all Cadillacs except for the Seville, which was powered by a fuel-injected Oldsmobile 350