I'm buying a 4.33 LSD rear end from this guy and he's saying that the half shaft will slide in and out about 1/4". According to him, all it is a safety pin and told me that it worked fine regardless of the the shafts moving around. Would it ok for me to just stick it in to my GTU? or should I get someone to rebuild it for me just in case? If I do rebuild, how much does it cost?

Jay Kim