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Old 03-09-2012, 07:56 PM   #2
Mike C
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Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,739
Re: 1971 GMC 2 wd conversion

Not sure how the best way to combine all the parts would be. On 67-72, the 4x4 hangers are different than the 2x4. They lower the spring which is why 4x4 sits higher than the 2x. 4x4's also have 2 1/2" wide springs while the 2x4 has 2 1/4". Except Longhorns that had 2 1/2" wide leafs as well. I haven't looked at the parts Longhorn that I have in awhile to remember if the hangers are same as 4x4 or not, but I think they are. Longhorn also had 40" spring centers like the 4x4's.
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