Im using stock Jato hub carriers with 6x11 and 6x15 bearings, and some aluminum arms meant for a jato.
Heres some really old pics, but they show what Ive done pretty well:
Youre using RPM rear arms right? Youre probably going to want aluminum with the big rear tires. The arm flex will cause pretty bad wheel hop. The stock jato arms did anyway.
I wouldnt discount the integy adapters already, the maxx wheels will have a lot less offset than wheels meant for a rustler so the center of the contact patch wont be too much further out. It looks like the shorter 2 hubs with the zero off set wheels would be about perfect. With my 1/2" offset wheels and jato arms, the inside of the tires barely clears the outer edge of the body, and I had to trim the fender wells some to make it work. The body is a desert rat meant for a maxx, rustler bodies look stupid on this thing now. My rustler is longer and wider than my 1/8 buggy.