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Duallie · 08-23-2003, 04:33 AM

My nearly complete decade-long project is a 1972 C30 cab-n-chassis, so I also agree that a duallie can be cool!
One big hassle you will experience is the lack of highway gears for your rear axle, which is undoubtedly a 10.5" H-072 corporate axle, otherwise nicknamed on this board as an "Eaton". By far, the most common ratio will be 4.56:1, with a few 4.10:1 (the tallest stock ratio), and a very few 5.13:1. Aftermarket has a 3.90:1, but its supposed to be $400. So my recommendation, since you stated you wanted a duallie PICKUP, is to get a '73 or newer Chevy/GMC duallie PICKUP rear axle (Dana 70) and put 3.73:1 and a torquemonster under the hood. That way you can still have 4 feet of cargo space between the rear fenderwells, too.

08-23-2003, 04:33 AM	#4
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	My nearly complete decade-long project is a 1972 C30 cab-n-chassis, so I also agree that a duallie can be cool! One big hassle you will experience is the lack of highway gears for your rear axle, which is undoubtedly a 10.5" H-072 corporate axle, otherwise nicknamed on this board as an "Eaton". By far, the most common ratio will be 4.56:1, with a few 4.10:1 (the tallest stock ratio), and a very few 5.13:1. Aftermarket has a 3.90:1, but its supposed to be $400. So my recommendation, since you stated you wanted a duallie PICKUP, is to get a '73 or newer Chevy/GMC duallie PICKUP rear axle (Dana 70) and put 3.73:1 and a torquemonster under the hood. That way you can still have 4 feet of cargo space between the rear fenderwells, too. __________________ Just as if I knew what I was doin'