The Stovebolt Site Forums The Parking Lot Tons 'o Fun anyone change out their 5.17:1 diff gears?

Large, I don't mean to hijack your thread, but my question fits nicely with this discussion:

My '59 has the dually HO72 with 5.17 gears. I want to swap to 4.57 gears and have located a 1958 3800 with single rear wheels. Unfortunately, it is parked so as to be VERY difficult to access the rear end (I will need to use a front-end loader to lift the truck). So, before going to all this trouble, I'm hoping someone here knows if it is likely to have 4.57 gears, or did all 3800s come with 5.17 gears?