2 door or 4 door?
A 2 door of that year, with the 16 valve and a 3 speed auto will have 4.30s.
A 4 door of that year, with the 16 valve and a 4 speed auto will have 5.12s.
If nothing else, jack one rear tire off the ground, put the tranny in neutral, spin the tire exactly 2 revolutions and count how many times the driveshaft turns. However many rotations the driveshaft makes, in 2 revolutions of the tire, will be what the gear ratio is (4.30, 4.62, 5.12).