@Castellen
Great page! I did the INT mod many years ago on my A3000 to make the PPC work and I remember it looking just like your photos (I think I got it off another page though). My machine is a 25MHz 030 model and has Ramsey4/Dmac2/Buster11 combo w/ 16MB zips on the motherboard. It works with a Phase 5 CyberstormPPC no problem. The original A3K SCSI controller also works but I use it only for an external CDROM, so I had to use active termination on the internal scsi cable.
A suggestion for a hardware guide might be for A1200 motherboard timing modifications for accelerator compatibility.