I could probably change resistors so that it'd work on a 167 bus but there doesn't seem like much point as I have friends in the Mac repair business and could likely get all the dual 1ghz I want. Dead power supplies seem to be the leading cause of death for the MDD. I have a couple of MDDs with dead power supplies so I'd hoped that this one had a good one but no such luck. I'm thinking about using a PC power supply to get one going.. Don't know if there's one that'll fit in that space but I could always run it outside the case.