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I have the chance to buy a posi rear chunk with 4:11 gears. The case is marked with casting number 3707306. I have looked to see that the casting number belongs to a 56 and the build date is E266 which from what I read indicates it was built May 26, 1956. I also have read that there were no posi offered in 56, so someone has obviously added the posi unit. Now my question, what is this worth assuming all is in good shape? I know it's hard to put a value on it but maybe a range? Thanks for any help.
 

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I just put a posi in mine sock chunk modified, Carrier was 500.00 new gears 200.00 new bearings 100.00 so I would say $600 used and - new $800 now... that is JMO. thx gkk
 

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Sold my 411 posi on Ebay for $700 two years ago.
The 57 case had the large P on it.
It had new bearings and new seal in it.
 

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I recently bought a similar rear with 336 gears and a posi unit in a non posi case, unit was recently overhauled. Paid $300

Don
 
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