First off, unless your 98 is totaled or otherwise unsellable... I wouldnt take the motor from it.... There are plenty of bargians out there to get supercharged motors with transmissions, wiring, pcm out there for quite cheap. (not ed morad)
Also, doing a turbo is quite simple and cheap.... it is probably cheaper than doing a mild buildup of the m90 setup, and nets you alot more horsepower.