RV transmissions?

Did all those old RVs use a different lower geared torqueflite if it had a 440? The reason I ask is ive found a engine transmission combo for my little brother when he finds a project car. Its a 76 Winnebago, 440 automatic complete engine carb to pan, only 200 bucks but we have to pull it out ourselves...no big deal. Just wondering if were would even want to use the trans thats behind it if it is geared really low. thanks