It is relatively easy to build a Dana 60, because all you have to do is to narrow the axle tubes to fit your application, and they are straight, no curves. Moser, Strange and others have the housing ends you need. You just have to decide what brakes to use. I built the latest one from a Jeep J20 rear axle that was 40 years old. It came from a wrecking yard with a 4.10 gear on a PowerLock carrier with 35 spline axles and tapered Timken bearings, 12" drum brakes, 5 on 5.5" bolt pattern that will easily fit my '87 D100. The Dana had been rebuilt (new bearings, clutches & brakes) when I got it for $400.00. I put another $400.00 into it having 1 tube shortened and 1 axle shortened and resplined. Your experience may differ, but I am pleased