Sure is a lot of complication for such a simple solution readily available. Just chuck the whole axle and replace with a 1977 or later XJS or XJ6 axle using the tapered bearings and a crush sleeve. This was used through the end of the XJS and XJ6/3 run. You leave all of the shims out that were between the diff casing and the axle housing. bolts right in and works fine.
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