Roller bearings, they're supposed to be stronger, they do have a little more friction by design but they're all timken an rated to 450hp so it should be good
And t5 fits well, had to do a littl trimming for th b&m shifter and finishing th new crossmember right now
Got the rear end put together, third member painted factory red oxide and then sprayed the rest including disc brackets with a satin acrylic urethane. Also welded on brackets for the brake hoses. Should be super durable an looks great.