It won't bolt into your blazer. last year (far as I know) chevy put a 60 in the rear of anything was 72 and actually that was GMC only. A 14 bolt is the only way to go. Cheap and bulletproof, plus if it's out of a K20 it'll bolt right in your blazer with zero mods. Even the shock mounts will be the same. $150-175 is as much as I'd pay for a 14 bolt. Some people think they're worth more but they're dreamin. There are literally hundreds of them rotting in junkyards right now, and all of them except the one you pull will go to the crusher.