I have a Ranger XLT and it did not come with AC.
Custom:
Pretty much your stripped down version although it could have been ordered with just about any individual option you wanted to put on it. A Custom model included: low back bucket seats, vinyl floormat for the front only, 25 gallon gas tank, manual steering, 4 speed trans with the 351 motor and the 205 case.
Exterior features were:
hub caps, black painted bumpers and the stainless mirrors.
Ranger:
Not offered on the Bronco, only available in the F-series lineup. Those upgrades were:
The bench seat had a chain mail vinyl seat upholstery, it also included a color matching vinyl floormat, sunvisors, seat back covers in the regular cab model and white headliner with chrome trim.
Ranger XLT:
The front seat used a combination of cloth and vinyl, insulated woodgrain door panels, carpeted flooring, woodgrain around instrument cluster, passenger dash and the glove box, woodtone on the steering wheel horn button, chrome trim around taillights and halogen headlights. The XLT also got the body side trim.
Exterior:
Chrome bumpers, chrome molding around the windshield and side windows in the top, chrome molding around the drip rail by door, chrome wheel well lip molding, rear T-gate chrome pieces, and the body side trim.