Could it be a posi.?

[woody82]

I bought a 72 Cheyenne long bed factory big block recently.I have been doing some work to it.I would like to post some pictures of it when I feel it is ready.My question is could it have a posi rearend under it?I was changing the tire on the right rear and noticed it would not turn.I didn't jack up the other side because it was to darn hot that day.
I will post some pictures at a later date and tell you all why I decided to buy this truck.If you are interested.