A trip to the junk yard…..

[Sport/Truck]

I went to U-Pull It today and found some interesting stuff.
One that I didn’t know is what looks to be factory power steering on a ’67!
I didn’t know they offered PS back then. Is desirable for the ‘67 people or do they want something newer?

I think I found a posi and have some questions these rear ends. I was walking around several 76 -72 trucks and rotating the rear ends and found one that spins the drive line from both ends. Its on a ’70 1/2 ton 350ci. Does this mean that it may be a posi? On the others only one side would turn the driveline (mostly on the passenger side).

I also found this rear end with a cover off and thought it looked like a posi. Is it?

I’ve read threads on here that suggest that the junk yard finds may cost as much as upgrading the one I have. Is this a true statement? Or do I need one to have the correct pumpkin housing anyway?
When you guys are mentioning 12 bolt that’s the number of bolts on the ring gear right? The one in the picture is 10 bolt is it any good?
Thanks
s/t