The Elephant In The Room: unloading the load from a B-body.

[rmchrgr]

All roads of weightlessness ends with this. An NOS Magnesium Dana rear section.

The craziest part of that thing was that it had threaded holes for a pinion snubber. The case was through-bolted like the later aluminum 8 3/4 housings. The mag Dana was made by Henry's for the Ramchargers. The mag rear cover was super light too.

Magnesium Dana 60 info