55.2-59 Rear differential gearing?

[Missyblue]

hey just curious if anyone knows the original rear gearing? I lifted my back end and it my driveshaft only turns 2.5 revolutions to the the tires one. That's seems low? My driveshaft isny hooked to anything it's just wired loosely to the bottom of the truck. Trying to decide if I wanted to try to run the original rear but unsure of its geared that way. I attached a photo of it. I guess i dont know if it is original. Thanks!