I tried to modify a power supply adapter that had been used in a Digital Audio for use in my Quicksilver without success.
The Board layout, height, and slot line-up are also problems.
But, I too wouldn't mind repackaging my Powermac.

I'm also going to look into improved cooling for my OWC 7455 processors.
With luck, I may be able to push it to 1.6 GHz where it should out perform 7447 processor (and possibly even given 7448s a run for their money).

[ Edited by Jim 09.12.2011 - 13:28 ]