There is a Dana 60, 4:10, Trak-Loc in my '74 W200 Dodge Power Wagon, but it's not for sale.

When I made a Dana 60 Truck-to-Car conversion 12-years ago, I got the donor Dana 60 out of a '72 Dodge B300 Van. It had 4:10 gears and a Trak-Loc.

It cost $73 at the local Pick-A-Part, Floating-Axle, drum-to-drum.

I had a donor 8 3/4 housing in my collection, so cut the bearing ends off and a local shop grafted the ends on, inspected and checked the tooth pattern/setup, etc, for $200 total.

I had a set of 30-spline 8 3/4 aftermarket axles (which fit the 30-spline Dana 60 Truck differential). Had to have one axle shaft cut shorter by an inch.

35-spline axles are better. To install, you need to buy some 35-spline side gears. I just saw a New set of side gears for $100 on eBay.