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 Transmission / Driveline and Traction
 Economics of Buying 12 Bolt Rear Core
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Douglas Willinger
Sitting Bull

USA
139 Posts

Posted - 12 Sep 2018 :  01:24:03 AM  Show Profile  Reply with Quote

If one is planning a car project build that would eventually include adding a Chevrolet 12 bolt, and casting numbers and housing stampings are irrelevant, is it better to buy a used 12 bolt assembly to have rebuilt, or just purchase a complete rebuilt assembly from a company such as Moser?

Am contemplating a 1972 Le Mans 4 door hardtop for a later project.

Eventually I would build a "small journal 455 HO" (1972 455 HO top end on a 1972 400 block with 4.25 forged aftermarket rotating assembly).

Most of these cars came with a 10 bolt which would be either a 2.78 or 2.56, the former being standard with a/c which this car had originally.

I have found for sale a 1965 Chevy Chevelle/Malibu A body 12 bolt in the $500 range, non posi with 3.07 ratio, which has an advantage as a 1965-1967 unit for being narrower to provide space for wider rear tires. And I see that Moser charges about $365 extra for this earlier application.

How would the economics of such a purchase, assuming nothing seriously wrong, measure up?

Douglas Willinger
Sitting Bull

USA
139 Posts

Posted - 21 Sep 2018 :  12:07:36 AM  Show Profile  Reply with Quote
I see that the spring perches differ than a 1968-1972 unit.
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