74 duster bumpers

Be sure to confirm the year and application of any you look at. All the '74 Dusters that I've seen have front bumpers with standard bumper brackets which interchange with 1973 only and the rear has the "shock absorber" bumper brackets which interchange with 1975 and 1976 only! The standard mount and "shock absorber" mount do not interchange. I've seen a few people not know which they are selling.