Turns out there is no CD-ROM drive, or even a mounting bracket for it. I stuck in a tray-load 300i I had, but the faceplate is for a caddy-load. Oh well…
The video card appears to be a Thunder/8. No slotted VRAM on the card. (What kind does it use?) No slotted VRAM on the mobo, either (doesn't matter to me since it will be headless), and 16 MiB slotted RAM. I bumped that up to 64, for 72 total.
I located my old A/UX drive so I didn't have to reinstall. It did a self-check after booting, and rebuilt the kernel. Now I just need to get it set up on my shelf, and verify networking.