Rear axle
#3
79-85 will fit if you are looking to just replace the axle itself or the entire housing
swapping the complete housing from an 86-95 does gain you 1.5" in width on each side and bigger rear brakes, early brake drum on the left, later IFS rear end drum on the right, bigger brake = better

you would just need to run 1.5" wheel spacers upfront to get your track width to match.
very common swap
swapping the complete housing from an 86-95 does gain you 1.5" in width on each side and bigger rear brakes, early brake drum on the left, later IFS rear end drum on the right, bigger brake = better

you would just need to run 1.5" wheel spacers upfront to get your track width to match.
very common swap
#5
Not required, you can leave the front as it is and the rear will be 3" wider. Or you can add the spacers up front if you want the f/r track to be equal. I ran almost 10 years with a narrower rear axle than my front.
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