Need diagram for rear end on 88 dodge ram 100

My rear differential (or rear end) is out, and I need to get it replaced.

Here is the information I have so far to assist me in locating one, but need more info because the place that wants to sell me one said if I buy it and it's the wrong one, that I can't bring it back.

So please help?

Ok here is what I have :

5 Bolts on wheel

10 Bolt on differential

Ok, thank you and please get back to me with what more I need to get an exact match.

Joe