The life of a Magnum (and 46RE question)

magnummopar said

If you swap out the OD housing and output shaft from 4x4 to 2wd they work great.

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You guys make this sound real easy. Just where in hell do you FIND 4x2 housings and shafts, since there seems to have been "FAR" more 4x4s made that 4x2s?