Try the crown vic 101 thread for the basics. Anything specific you were wanting to know about 98-02 cars? The rear end is what you'll need to figure out. It has a watts link rear so you will either need to make/buy conversion mounts to run a more standard 4 link setup or run leaf springs.
Front is close enough to all 79+ fords, in 92 they switched to the smaller a-arms instead of stamped steel. Opinions vary on them