Looks like I have a bad u joint on one of those that dont come apart too easy. It's the one in the middle at the front end of the rear tube. I can unbolt at the differential I believe to get it out, but then what. I don't have any special presses, ect.. can I still do this myself?

Yes and they make special repair kits for them.
But they are a pain and mark everything before you take it apart.
They are easy to get out of time or balance.
If you are not sure on replacing U joints on it take it by a auto machine shop and let them do it for you.
Good Luck
MT