got a good deal on a 342 posi so my rear is for sale.
8.2" posi rear drum to drum. 256 gears. just pulled this from my car. 70 Skylark
nice tight posi. no noise or vibrations. I'll get pics up tomorrow.
$350
located in Levittown PA 19057

 

Is it a 10 bolt cover rear? What is it out of originally? Thanks

 

yes it's a 10 bolt. I'm pretty sure it is the original rear that came in my 70
Buick Skylark.

 

I would like to see the picts, I am right over in trenton nj...

 

here's the pics

 

Looks great, are you sure its a 256, what is the letter stamp?

 

they are 256's. could cruise 80mph with no problem.
where is the stamp you are talking about?

 

No but I sent you a PM.

 

Is this the same axle as what was installed in a 1970 Monte Carlo?

 

your car is an a-body so this will work.
originally your car had a Chevy rear. I think you will need a different u-joint