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Old March 29th, 2018, 01:12 AM
James James is offline
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Join Date: Jun 2013
Location: Greer, SC
Truck: 1964 GMC 1500 2wd
Age: 69
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Default Re: GMC 3/4 ton frame swap question

This is my belief. I would change the rear axle for the ratio you desire. In my case I changed the rear axle gears in my 1500, went from a 4.11:1 to 3.54:1 and added a posi unit. Made a big difference cruising down the freeway. I had also change the brakes from drums to discs at the same time, plenty of stopping power now.
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