SCSI drives? How did you install it?
The only OS that can boot from the IDE controller is *BSD or Linux. Mine either has a Qlogic ISP1020 or 1040 controller. Video is from an Elsa Gloria Synergy card. It boots fine from an old 12x Toshiba (XM-5701B). For ethernet you'll a DEC Tulip based NIC. Installation is pretty straightforward once you boot from the media. If you want I could get more details. The trick is finding the right cards on ebay where the seller is not advertising them as specific for Alpha or DEC. People were selling that ancient 32mb video card for $150 while its really only worth $10.
I owned a Tekram SCSI controller with the correct chipset but wrong PCI ID. Nothing would boot from it. So I had the bright idea of trying to hex edit the firmware binary to the matching ID. My understanding of binary was less than stellar and ended up bricking the card. Who knew the values had to be entered backwards?