I posted this exact same post on Zilvia.net and I haven't received any replies. I'm sorry for making this mistake and it will never happen again. Thank you guys for all your help. I'm kinda new to the world of Nissan and have been trying to work on my car all by myself with the help of this website, of course. When I purchased this diff, the guy told me intially this diff came off a Skyline then he installed it in his S13 but didn't have it long due to engine failure. So, now I have it and here are some pics and it seems like the Diff is a JDM S13 Viscous Diff. Sorry for my mistake.

I found a pic of a similar diff on
http://www.japaneseengineimport.com/accessories/
Here is a pic of the stock S14 diff.
Thanks again for all your help and sorry for the confusion. Does this JDM S13 Diff require bushings or can a bolt and washer slap right in? Is there any other issues that I will encounter? Thanks again.