Oh my goodness you are in for a world of hurt swagg. Doing a one off swap is a major headache. Turbo power is a great thing...nothing is better than hearing the tubro spool and feeling those g's. But this is too much....If you want import power buy an import.....the s13 swap is easy because thats a Nissan car and the RB engine is nissan. I would suggest buying a 240sx or an old skool RX-7! But if you dead set on your Catera than swap in a Corvette V-8...keep it all in the family. There are some awesome remote mount turbo systems. Check them out
www.ststurbo.com