Just shows, rare and difficult to find is a relative thing. I'm with Truckfarm72, I believe I could have one located and in the bed of a pickup in a couple days if necessary. But then I'm retired, have tools and know where a lot of old junk/salvage yards are. The thing to remember is there are old weed covered salvage yards with old trucks hiding is said weeds in every state and most counties. That's where you can find HO72 and HO52 4.10 gears. You can use either, matters not as far as I know.
RonR
