Installed, nice and neat, works real good.

What is it and who is it by?

It's an electric vacuum pump from SSBC.

That's correct

who actually MAKES the thing? i bet it's also an OEM application of some sort, just would be good to know from what.
finding this stuff out nakes it easier for us junkyard dogs to get a same/similar setup for pennies on the dollar and spend the money saved on gas or go fast parts.

I don't know who makes it, but you can get an OE pump from Autozone (it's the same pump), for some $160. I posted about it a few weeks back.

I was in the market awhile back when I had a 350 with a Comp 305H cam in it (not anymore). Anyway I did the normal Google search thing and came up with all kinds of stuff. All sorts of GM, Ford and Mopar cars used these things, even motor homes. There were several guys who had complied list of vehicles so you could go on the junkyard search. So, if anyone needs one, spend some time searching, it's worth your while.

Stainless Steel Brakes Corp. (SSBC), makes the electric vacuume pump. Sold tru Jeg's $259.