Is this worth cleaning up
I have 3 rearends at my disposal,my OEM 3.23 rearend,one with 4.56s',and the 3rd in process for 4.10s'. I de-rust,clean,prep, and POR15 coat them.

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I don't know what sandblasting would cost by I'd imagine not less than $100 so I'd get the junkyard rear if I had one like yours.
Or just a wire wheel on a 4 1/2 inch angle grinder and my small sand blaster in the corners of the brackets. And if all the rust won't come off I'd use rustoleum rusty metal primer in a brush can. It works better than POR15, Ospho, etc.
TL&DR I would say clean it up.










