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#11
02-09-2009, 06:49 PM
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Re: Rear gear change
Lets see, '72 Olds having the 8.5" GM 10 bolt...lots of choices indeed.
For the torque that you have in that Olds a 3.42 or a 3.55 would make for a real runner. Mine had the 3.23s in it and on the drag strip, they ran within .02 of the 3.91's. If I could go back, I would try to find a set of 3.42's but, Richmond does not make that for the 'O' axle. 3.73's will make it a little buzzy, but you can still run down the highway.
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Snarl softly and carry a big stick! 1969 Hurst/Olds 13.26 @ 103.12 Pure Stock Rusty Small 
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