Posi Differential for 1972 C10

[skydiver]

Hello All,

I am looking for some advice on rear differentials for my 1972 Chevy C10. I am looking to swap out my standard 12 bolt non-posi differential for a posi. Does anyone have experience with this? What should I look for in buying a posi differential? What type of information do I need to make sure it will fit my truck? I have seen that there are different numbers of splines, how do I tell which number I need? Also, is this something that can be done in my garage or do I need special tools, etc. Any advice will be helpful.

Skydiver

1972 Chevy C10 LWB
350 4 bbl