Dana 60 Power Lock Questions

[SavageC20]

I picked up a complete D60 limited slip on Craigslist for a couple hundred bucks. Guy said it came out of a 69 GMC 3/4 ton. Are the spring perches the same on a 2x4 and a 4x4? I have no idea if it came out of a two wheel drive truck or a four wheel drive. I am wanting to put this under my 72 c20 because the d60 is an open diff and it is very tired. I am hoping it will bolt right in.

Also would 69 be a power lock or a trac lock? From looking at it I think it is a power lock. I jacked one wheel off the ground and turned it and it had good resistance so I think the clutches are still in good shape.