can any 1 tell me what kind of gears these are?

Its an 8-3/4 rear with a 741 case.....To check ratio, easiest way is put a mark on the drive shaft and a mark on the tire.....jack up rear wheels if sure-grip and spin tire one revolution and watch how many times drive shaft spins....3-1/2 time is 3:55 , 3-1/4 turns in 3:21....etc. etc...If you jack it up with both wheels off the ground and the one tire spins in the opposite direction when you turn it, it is an open rear.....And you can still check it to see what gears on in the rear by using the same method as described above, however one tire must be on the ground when checking.....So only have one tire in the air....