[timothale]

There is some info stuff on E bay on warner overdrives. I don't know if yours was manufactured by or under borg warner's patent. There were 2 common overdrives, a 3 planet and the heavier 4 planet, depending on which car company, or engine was used. My old college Auto engineering text books are down south at our winter home. We came back north for thanksgiving and Christmas then will go south again.

[AutoGear]

Pick up a "Motor's" manual that covers 1963. It will have just about everything you need. Similar to these: Antique 1965 Motor's Auto Repair Manual | eBay

There was a truck website (for old suburbans I think) that had copies of literature related to the Warner R7 and R11 overdrives, but I can't find it at the moment.

The "other" Overdrive unit commonly available then was the Laycock design; which was used in a lot of British cars (MG's etc). Then I believe AMC bought a large pile of them, and some of those ended up being modified for the first Gear Vendors units which we still see today.