Hi - the ratio will either be 4.1 or 4.3. There is a sticker on the front diff tube (if it survived this far) which will be R16,R17,R56,R57 or similar. If you use the search function on this forum using keywords “diff ratio”, you’ll find quite a few threads on this subject, but I have yet to see a definitive list of codes and ratios.
You can also find out the rear diff ratio (there is a code on the VIN plate such as A02B). The front and rear diff ratios will be the same. I hope these clues help you.