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

Here's a big thread on the Pirate 4x4 board on the Eaton rears. http://www.pirate4x4.com/forum/chevy/771317-eaton-h072.html

A '69 and a '52 should both be the HO-72, and should directly interchange if they are. (At some later point a Dana rear was an option IIRC, but it won't look anything like the Eaton)

As with the thread on the pirate board, I don't think the 4.10 gears are hard to find at all. Most of the later trucks seem to have them.