I did a 2001 bravo to XR set-up and just as AXA pointed out, the gimble and collar needed to be changed out to fit.

I have been thinking about doing the same on mine, (tired of breaking drives) but I have boxes.
Do I still have to change gimbal bearings?

You need a brg with a red dot. The dot should be at 10 o'clock. Newer boats will have this brg already (my '05 did) The inside diameter is larger on the red dot brg. They are easy to replace: http://www.mercstuff.com/gimbalbearing2.htm This is all you need to watch for. It's a simple swap. Here is the thread I started when I blew my X. The guys on Donzi.net were awesome and I bought the XR upper from this site. http://www.donzi.net/forums/showthre...k-In-Forward-(

If you decide to go with an X drive, I have one that I'd part with. It's a 1.65. PM me for det's if you're interested.

I did decide to go with the x-drives and they were installed yesterday. So I am good to go for the weekend :)
Much lighter in the wallet though so I should get another 1/2 mph :D