All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
So I'm not understanding what exactly you are trying to accomplish with cutting up this rear end you bought. Seems like a lot of time effort and costs. What's wrong with the 14 bolt that's in there?