Rear end help

[Nchristi]

I've got a 53 gmc and I'm going to do a lwb s10 frame swap. I've got the s10 frame torn down and ready to be sandblasted. I'm currently looking for a Chevy blazer 4x4 rear end with the 8.5". I've been to every junkyard Within a one hour drive and I've only seen two and they were the 7.5" version. I'd like to stick to the chevy bolt pattern. I did find a zr2 s10 4x4 that had the 8.5" rear end. I've seen measurement posted and people saying that it will or will not work. I just want to hear from someone who has tried it or done it with the zr2. The zr2 rear is $135. Thanks in advance
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