I'm guessing 75 -76 "A" Bodies, Dusters, Darts, Valiants and 76 -80 "F" Bodies, Volare and Aspen. Most 26 spline output shaft A833OD were behind a /6. I assume 30 spline output shaft A833OD were behind 318's and 360's. I have one each, 30 spline and 26 spline, that has been rebuilt if you can't find one. I usually swap the large bearing retainer main case for the small bearing main case so I can use them without changing bellhousings. Trucks had them also during those years but they were long, same as "B" and "E" body cars. You would need a custom shifter adapter to use one of those.