rear end swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

02-23-2015, 11:57 AM

chevy_mike

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Join Date: Jul 2006

Location: San Diego, CA

Posts: 3,836

Re: rear end swap

Quote:

Originally Posted by chevyrestoguy

When they went to the 5x5 bolt pattern in 1971, the width increased 1.5". Not sure why they decided to increase the width, but I always assumed that it was in preparation for the redesign in '73 and it was a cost-saving measure.

IIRC it was due to the change to disc brakes up front. This brought the wheels out .75" per side, so they needed to do the same with the rear end, hence it being 1.5" wider.

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