ITS and standard Bravo bolts and transoms are pretty much the same. On the ITS you will need a special hydraulic steering block on the inside of the transom plate (Interior) for the hoses. The plates and the rest are the same.
I reccomend you talk to Ron at Imco for the steering connection, and get the diagramm. Its, somewhat complicated, but worth the trouble.
(BTW I have some parts left)