It turns out that the hardware I purchased was taken from a IBM 7587. Much thanks for everyone who assisted me!
-- Origonal Post below--
So I finally bit the bullet and have decided to dive into building a socket 7 system, and I had the brilliant idea of using Industrial hardware after watching both HighTreason160 and PhilsComputerLab. I've have been looking at some of the wonderful PC104 dos boards, and I wanted to build something also of similar size. So I decided I'd go a little bit bigger and use a Single Board Computer (SBC) using PICMG over PC/104, since they run a bit cheaper and allow me to use PCI card. I managed to snag a processorless SBC and back plane for only 40$. 😀 But before I can make any more purchases, I got to figure some things out.

The seller didn't quite know what the hardware was, although they had a good guess that the SBC was an IBM 586V. I believe it is actually a IBM 586VE, judging by this site and their pdf manual.

I haven't got a clue what the backplane is, and that's what I need the most help identifying, and what form factor it is so I can find a case that can mount it. My old school Lian Li case doesn't match any of the holes, so I can safely assume it's not AT, BT, or ATX. I've seen other backplanes used in 2U units. The other quandry is powering the backplane, but that may be as simple as getting an AT connector converter with a P10 connector after feeding it through a -5v generator.

Anyway, here's my google drive gallery with the pictures.

Thanks for any help, clues, or insight you can provide!