This Fat came in today with the serial #86663 which looks like an 86 with a mix of 86/87 parts so we are thinking it is a late one built up when the white letter XT came out.
One of the cool things is the fork. Talking around we have found that the fork was made by Ted Wojcik...more info later on that. The owner still has the original fork which we should be getting soon and will put it on the bike and have the Wojcik for on display. Pretty cool stuff, I will post more up about it as we clean her up.