I don't think a pc board will work in a MDD case. The mac logic board is upside down in the MDD , And the PC board pci/agp slots won't line up. like in the older g4 cases. I could be wrong though ,check before you buy any expensive parts.
Mac Pro
Powermac G5
Powermac G4 DA
Sawtooth G4 AGP
Powermac Cube
Atari 2600,