Compatible? Nothing. You will be going custom fitment on every single part you want to put on the bike. No, twice as wide will not fit on the rear especially not if you lace a 16" rim on.
Really sounds like you JUST got a pretty sweet bike, and plan on diving head first into the deep end. Possibly to never finish it because of the cost and skill involved, possibly to just end up with a fucked rat bike that was better off as it started. Make it run, make it a bit quicker, put your head into the bike before you plan major things just by standing and admiring it. There is a lot of stuff in there that you can't see.