Quote:
Originally Posted by submariner68
73-up will work?
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Yes and no. Depends on what you are after. 73-87 1 ton rear axles will bolt in and have the correct 67-72 leaf spring spacing. You will need to move one shock mount to complete the swap. Anything thing 3/4 or 1/2 ton regardless of 2 or four wheel drive will need the spring perches moved and a shock mount as well. As said above any front from 71-87(91) will bolt in and have disk brakes.there were only 3 front axles offered in those years, dana 44, GM 10 bolt(very very close copy of the dana 44), and the king of them all Dana 60. The lock in hubs vary thru the years, axle manufactures (dana,GM) vary, axle shaft and axle u joint sizes vary slightly in the early 70’s dana 44’s as well but they will all bolt up and accept the same steering boxes, drag link, shocks etc. My personal preference axle wise even though you’ve only got a half ton is 73+ 1 ton 14 bolt rear with a ‘77+ 1 ton dana 60 front axle. This combo is as close to bomb proof as you will ever get. If you want to stay 1/2 ton 6 lug, a 69-72 4x4 rear is the only one that will be bolt in.
Quote:
Originally Posted by kwmech
Yup, up to 91 in the Suburban and Blazer. Up to 86 in the trucks. 87 was the new body style and ifs
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Sorta… 88 model year was the first of the IFS GMT 400 platform which did start production in the second half of ‘87. An ‘87 model year is still a square body. Crew cab 1 ton carried over to 91 as well. (I’m confident you knew that but pointing out for others that may not)