I always stay mixed up on the Bull Nose, Brick, OBS...... So I just always say mine is a '90 model CCDually & it's still going. Come home tonite looked down & I was going 85+.... must'a been wanting to get home!
The naming convention you see on here (and other places):
1967 - 1972: Bumpside (because of the body lines near the top of the fenders/doors)
1973 - 1979: Dentside (because of the “dent” near the top of the fenders/doors) - My 2nd Favorite Bodystyle
1980 - 1986: Bullnose (last model to use glass sealed beam headlights) - My Favorite Bodystyle
1987 - 1991: Bricknose (Has he large plastic headlights and is flat as a brick)
1992 - 1997: OBS (Old Body Style / Original Body Style (I’ve also seen this called the Aeronose) which I’ve read came after the SuperDuty body F-2/3/4/550’s came out because it was the “original” truck to have a 7.3PSD - “Since Ford never had a diesel before the PSD…. )