Photographs are not going to tell you what voodoo magic is going on inside the FPGA, the ROM/flash chip, etc. It won't work without that stuff, even if you manage to reproduce the PCB layout and get the electrical characteristics of that layout working well for timing, signal integrity, etc. And to really recreate the PCB, you'll need to sacrifice at least one board, probably more, to get chip pin pads and internal layer routing scanned. Than you have a PCB, an empty FPGA, and missing parts that are no longer available or sellable in a product due to ROHS.
If you're going to go to that much expense/effort to re-engineer such an old and complicated thing, we're all better off if you instead use that time and money to create a new board, ROHS compliant, leave out the 68K chip, and give us some more recent features, modern clock speed, memory, etc.