However, given the age of the vehicle (30+ years old), it's highly likely the timing belt has already been replaced at least once, or is overdue for replacement, regardless of mileage. The rubber in the belt deteriorates with age, even if it hasn't accumulated high mileage. A broken timing belt in this vehicle would likely cause catastrophic engine damage.
It's strongly recommended that you have the timing belt inspected by a qualified mechanic. They can assess its condition and advise on whether replacement is necessary. Don't risk engine damage by ignoring this crucial maintenance item.
