When I first bought my 98 SVT I recall rumors of the front brake lines failing under hard track conditions. I've never heard the story since, but it's worth an upgrade for the small cost and peace of mind.
Pulley upgrades are a must on the 96-97. I believe the 96 didn't have any flanges and they threw belts too easily. In 97 they added a front flange (or was it the back), but still had occasional throwing of the belts. By '98 they added flanges on both sides.
Also, the '98 had a unique fuel pump, compared to the earlier years, that was known for failing early. Mine let go at 16,000 miles (at about 8 or 9 years old) and I don't recall the aftermarket having one that fit at the time.
96-97 have the cowl brace, while the bean counters removed it from the '98....Lame Rat Bastards!