You can try to search the classified sections of these forums if you HAVE to have a GN turbo. I've been told the GN turbo might be a touch too small, so, you can't go wrong getting something aftermarket that is 'bigger'. Those Buick forums may teach you some stuff too. Just throwing it out there. I didn't look at this link you posted (at work, not a ton of time), but if it's for a Honda, it may be too small. It's not as simple as just saying, 'here is my motor size, what turbo do I need'. You'll find that out and you'll have a better understanding when you do. I've done a LOT of reading and I'm no expert by any means.
http://www.turbobuicks.com/forums/http://www.turbobuick.com/forums/http://www.gnttype.org/
