I believe 6.5s have a boost control solenoid that controls the wastegate signal. You could use that or a manual boost controller. Just find an HX35 with internal WG and you will be golden. If not you can get 38mm external wastegates on ebay for $60(which actually do work well). As far as the swap, they are both t3 flanged turbos, just a little welding on the downpipe and you will be good to go.