Most likely a 302. If I'm not mistaken, the 289 came in these.
- 1965-1968 FORD COUNTRY SEDAN, SQUIRE
- 1965-1968 FORD CUSTOM, CUSTOM 500
- 1965-1968 FORD FAIRLANE
- 1965-1968 FORD FALCON, SEDAN DELIVER
- 1965-1968 FORD GALAXIE
- 1965-1968 FORD MUSTANG
- 1965-1968 FORD RANCH WAGON
- 1965-1968 FORD RANCHERO
- 1965-1968 MERCURY CALIENTE
- 1965-1968 MERCURY COMET
- 1965-1968 MERCURY CYCLONE
- 1965-1968 MERCURY VILLAGER
- 1966-1968 FORD BRONCO, BRONCO ROADSTER, BRONCO WAGON
- 1967-1968 MERCURY COMMUTER
- 1967-1968 MERCURY COUGAR, XR-7
- 1967-1968 MERCURY VOYAGER
- 1968 FORD TORINO, GT 1968