Brian - Thanks for setting me back on the straight and narrow on the mount. While doing my weekly truck start and exercise this morning, I took a peek at my underside and reintroduced myself to that mount. Mine is decidedly well preserved (oil, road grime etc - LOL), but is definitely there.

Looks like
Chev's of the 40s carries that rebuild kit too if you aren't able to try Kevin's self-rebuild solution.