I know someone here probably can tell you with a little more info on your part. But you can always put the rear up off the ground and mark both tires at say 12:00 and turn your yoke by hand and count the turns it takes to bring both tires back to 12:00. For example 3.5 turns would mean 3.55 or 3.54. Where 4 1/8 turns would mean 4.11 and so on.
Hope this helps.
the trany is the biggest dictating factor in gear ratio.... rule of thumb.. (but certainly not set in stone) 5 spd most likely 3.07, and AW4 auto most likely 3.54s... however there were others available....
You could always pull the diff cover. Put new oil in after warads. Stamped on the Dana gears is the tooth count. 41 - 10 is 4.10 IMSC 3.54 would be 39 - 11!