My original '68 3.54 B body dana had been run in a pro street Camaro before I got it,
and the cover on it was plain steel but way thicker than a stock one. I believe I probably have the same
cover you have there but could never figure out where the previous owner sourced it. It's still on it.

I appreciate the down to earth stuff like that just as much as the fancy stuff
(actually maybe more, as the years pile on....maybe because it looks more familiar).

Not everything needs to be aluminum with 12 point ARP stainless hardware and all that, but sometimes that stuff is cool.