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Old 06-22-2009, 08:26 PM   #10
jeffspower
Well, Whoop-dee-do!
 
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Join Date: Mar 2003
Location: Easton, Mo. pop.- me & scarcely a few others
Posts: 2,302
Re: GMC V-12 powered '91 Chev crewcab

'57- '64 Olds/ Pontiac "big car" used a 9-1/4" rear, similar to a Ford 9". I think you may find 2.56 gears in a '64 98/ Bonneville cruiser.

'75- '76 Olds 98/ Buick Electra were common to have 2.42s. '71-'74 2.73s were common. Pretty stout axle too. The Olds 88/ Buick Lesabre/ etc. usually had a lighter rear end '71- '76.

I think you can find some Dodge diesels in the "NO OD" years that had about a 3.07 rear. That would make it easy for you to stay 8 bolt wheels.
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'68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD

'72 K20 500 Cad/TH400/NP205 SOLD

'92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver

'72 Monte Carlo... sweet low mile toy

'11 Dodge Challenger IE 392 6spd... midlife car
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