1990 rear axle help

1990 ext cab 2wd 454 dually
just got it last week, the drivers side only rear duals wobble. Not bad enough to really notice but I have a noise so I jacked it up and let it runs on stands to find noise.
(Noise is coming from center support driveshaft bearing)
I looked inside and drum wobbles but backing plate stays. I'm about to tear into it but my question is
What year of trucks will work. I know they made square body crew cabs in 1990 and I know where one sits in a bone yard.
Anyone else ever have this. Will a rear axle out of a 1990 square body bolt in. Thanks for any help>

Sounds like if you jack up the rear end your rear tires have play, wobble....on one side....your rear bearing might be going out , or most likeley its needs to be tighten down...here is a picture, its simple to tighten it down.make sure you pull the locking key (57) out ... spin in the retaining ring (item 58)....
its item 58 that has to be tighten down onto the rear bearing...then put the key back in....i will look for another page ....I had the same issue a long time ago.
of course there other steps before you can get to the bearings....
I always jack the rear end at an angle to keep the rear end oil from leaking out....when I have to pull the rear drive shaft....