 The 429 V8, which was standard on the Marquis beginning in 1969, was available as an extra cost option on all Monterey models each year including a two-barrel 320-horsepower version and a four-barrel 360-horsepower option from 1969 to 1971.Both of those 429s were replaced by single 209 net horsepower 429 four-barrel for 1972, which was designed to run on regular, low lead or unleaded gasoline as was the case with all Ford Motor Company engines starting with the 1972 model year.Engine offerings for 1973–74 included the 351 Windsor two-barrel standard on base Montereys and the 400 Cleveland two-barrel standard on Monterey Custom and optional on base models.