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Old 05-22-2011, 02:23 AM   #1
silorss
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1972 GMC Sierra long bed 2wd to 4wd project(need answers)

I have an all original 120,000 mile truck,its a 1/2 ton long bed.I am wanting to convert it from 2wd to 4wd,but I don't want to remove the cab from the existing frame. 73 - 87 4x4s r plentiful.my question is if I find one can I use 73 to 85 spring hangers front n rear n all 4x4 components and them mount right up ? Any answers woukd b greatly appreciated thanx
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Old 05-30-2011, 06:39 PM   #2
1mitch4
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Re: 1972 GMC Sierra long bed 2wd to 4wd project(need answers)

don't know about trying the later year stuff. I have been doing some research myself on a 4wd conversion. front springs are shorter on a 72 than a later model. rear springs are wider and frame is wider in that spot I think, putting your spring perches out to wide for your frame.

Scott
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Old 05-30-2011, 07:15 PM   #3
LeftCoast32
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Re: 1972 GMC Sierra long bed 2wd to 4wd project(need answers)

I have a full set of 1972 K5 Blazer Frame Hangers that I will let go cheap, $200.00 plus shipping. They were off a California truck being converted to 2WD so they are in great shape. I was going to convert from the '66 style with grease pins but decided to keep the stock hangers and suspension type.

Last edited by LeftCoast32; 05-30-2011 at 07:17 PM.
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Old 05-30-2011, 09:44 PM   #4
sierra4x4
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Re: 1972 GMC Sierra long bed 2wd to 4wd project(need answers)

With some minor modification you can use everything from the front of a 73-87 4x4 to convert yours to 4x4. I have a buddy that has done this. One huge benefit of doing this is you get better motor mounts and the longer front springs are plentiful.
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