RE: 3.3 shafts
I think all you need are:
The extended A-arms from the trx 2.5 t-maxx or newer ( I think that you may also need new turnbuckles when you switch the arms, but I'm not sure
New 3.3 axle carriers
and the shafts of course.
I think that is all you should need for the 4 corner shafts, but I'm sure someone whose done it will jump in and clarify...I hope