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Old 11-27-2014, 07:06 PM   #1
mark '87 930
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posi rear end in '56?

I have stock rear end in the truck with 4.10 gears. Is there a drop in pumpkin one can get to get a posi and retain the 6 lug? I though ti saw some posi units that bolt in from a Belair.

anyone know? or do you have to change the whole rear axle.

I want to retain the 6 lug and preferably not have to do any drive shaft mods (cutting or having to buy a new one.)
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Old 11-27-2014, 07:33 PM   #2
Wrenchbender Ret
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Re: posi rear end in '56?

There were some posi units available in 60-62 models that would fit your housing but they are very rare. We had one in a 60 panel at one time. I believe the later model Blazer rearends can be put in. They are 6 bolt & about the same width. It will have a better ratio for highway use.
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Old 11-28-2014, 04:25 PM   #3
mark '87 930
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Re: posi rear end in '56?

ok, I'll have to look at that.
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Old 11-30-2014, 02:50 PM   #4
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Re: posi rear end in '56?

Look into the late model Colorado/Canyon trucks, and I want to say 2000 and newer Astros.

They have 6 lug rears and disc brakes from the factory to boot!
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Old 11-30-2014, 08:36 PM   #5
mark '87 930
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Re: posi rear end in '56?

hmm, ok, I'll check for overall length and lug pattern.

I could always either pour lead in the pumpkin or weld it. JUST KIDDING.
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Old 12-01-2014, 11:16 AM   #6
mark '87 930
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Re: posi rear end in '56?

so, something like this wouldn't work?

http://www.ebay.com/itm/1955-1964-GM...ke%3AChevrolet
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