Yes it is.

It's why I love my BeigeG3 so much.

Except the area where you rung the IDE / SCSI cables through. Those slots are way too small and they pinch / cut the cables. This is easily solved with a dremel.

Just remove everything from the case first so you don't get metal filings in slots and whotnot, cut and vacuum.

So whatcha got going on in your 8600? They are great machines.