Here is what I found. When I blew my turbo I got a '99 turbo with bad wheels etc. I also liked the way the later models had the solenoid connected allowing me to discard the hard line on the earlier model. When I tried using the '99 turbine housing, it was smaller around the wheel area. I pulled out the grinders and whent to work. Now I have '99 housings with '96 wheels. The exhaust side fit perfect. I find that she spools quick and I've had no problems in about 2300 miles.
Cheers Derek