SGI 540 full tower case, ATX?

I dropped by my local used computer equipment store on a whim yesterday, and looked around for a while. Turns out they have an SGI 540 Dual P3-550(Expandable to Quad P3) workstation there for about $350. I don't much care about the internals, but the case is sexi! Well, in a nostalgic "OMG! SGI" sort of way.
See here:


Anyways, I'm thinking of getting just the case if possible, or talking the price down on the system and selling the internals on ebay. Proprietary hardware just isn't my thing...
What I am wondering is if anyone knows whether this is an ATX case that I could just drop my motherboard and components in? Or did SGI do what they normally do and make everything to their own specifications that aren't compatible with anything else?
I would like to install my current system that resides in a ghetto-*** Enlight 7237 into a more suitable case, and I was thinking of a Lian Li V-2100B before I saw this case. However, a large part of my brain still wuvs Silicon Graphics and frankly I'm surprised I didn't just buy this yesterday. Hell, I'm having a very hard time deciding whether I would even want to mod the thing, or just leave it as a virgin SGI case.
"But I need 120mm fans in my case... No! BLASPHEMY!"
"But it would look so cool with a window in the side! Must... not... speak... such... heresy!"