You have already answered your question...get a 3/4 ton Dana 60 truck housing, cut it down to fit, use big Ford housing ends, use sealed Ford bearings on 35 spline axles, use a PowerLock diff carrier for strength & longevity, 3.54 or 4.10 are easy to find to match the carrier, you will have to cut your driveshaft 1.12" to match the longer nose on the Dana, pinion yokes are available new in different sizes (use the strap style if you can) and make sure your u-joint matches the yoke, DAMHIK all this stuff.