If I understand you correctly, the current belt has only 63,000 miles on it. The recommended interval is 90,000 and many have gone well beyond that without incident. Of course, the age of the belt could also be a concern, depending on when it was last replaced.
My 93 has 211,000 miles and the belt was last replaced at 90,000 in 2000. Since the car is 14 years old with a market value of ~ $4000, I plan to drive it until the belt breaks, then replace it. That is the beauty of a non-interference engine. I am rarely more than 100 miles from home and have AAA+, so I get a free tow for 100 miles or less.
Yeah only 63,000 miles on it, guess I was under the impression it was a 60,000 mile belt...but knowing now its a non-interference engine makes me feel better.