[Brian]

John, I've done a couple of these now, much the same as you, however, I tig weld around the seam, evident in your last photo, also drill and countersink several holes around the periphery of the original outer 'casing' and mig through them into the new 6 spline sleeve to achieve good penetration.

Setting up the driveshaft in the lathe to bore out the rear, ensures the whole assembly runs true. All in all, in my opinion, this setup is superior to the solid driveshaft setup with the centre support bearing as introduced in 37.