Decided to fiddle with the Amiga a bit and see if the GVP ‘030 board works. Once I dug up the correct jumper settings for the 3001, it managed to boot to the “please give me a Workbench Disk” screen.
The floppy drive is bad, so I “temporarily borrowed” the floppy drive tray from the second A2000:

Using it and a Workbench 2.04 floppy, I managed to get a basic floppy-based system up and running:

Once that was successful, I installed the other cards - an Amiga 2091 SCSI controller/RAM expansion, and a SupraRAM expansion. So far, they appear to work together and give me a total of 1M “Chip” RAM, and eight megabytes of “Fast” RAM:

Now I just need to find a couple 50-pin SCSI ribbon cables and a small (4G or less) SCSI hard drive…