I threw most of mine out many years ago. Too much stuff. Of course, now I have a new pile of old stuff which is too much.
That looks like a fairly standard implementation for the day. Replacement 68000 running at the regular old 8 MHz, memory decoder logic, SIMM sockets for memory expansion, and a SCSI controller chip and SCSI connector. So you'd need the newer ROMs in order to get the benefit of the SCSI port.
That's actually quite similar to the NewBridge/NewLife upgrade for the same machine. The NewLife upgrade had eight SIMM sockets, IIRC and could use the on-board 512K of RAM ( couldn't use the 128K in a 128K machien) so one could install a pair of 1 MB SIMMs and six much more affordable 256KB SIMMs and have 4 MB of RAM.
There was a point where 1 MB SIMMs were over $100 each but 256KB SIMMs were about $5 or free depending on how hard you looked.