I have a dual 1.8 ghz. powermac g5 that im using as my everyday machine. I have the ability to get a motherboard and processor and watercooled setup from a 2.7 dual. But no enclosure. Can I swap the 1.8 stuff out and install the 2.7 in my enclosure. Also he says that he doesnt have a cpu cover. does that matter? will mine fit it?