I'm going to be changing from XR drives to 6's w/big power. How do I figure out what ratio to be looking for? The boat is a 51' OL I'm thinking around 900hp trips.

I'd call Mike at OL. Should have him do all the transom work, the cut outs so the drives are the right height.
You could also get in touch with Scott B, he may know the ratios also.

I was already planning on OL doing the transom work. Who is Sott B?

Sorry, bad typing. Scott B from AMF, raced the 50 OL with Turbines. He probably knows that boat pretty well.

Why not keep the boat stock so you can do a little travel with it and drive to Long Branch and buy a killer 42' OL with big sterling power. That 42 will wipe everyone in our area by at least 30 mph and will easily fit on a lift

I'm still considering all options. Before I buy anymore boats I'm gonna have to sell some of the ones I already own. I'm running out of room for storage. Besides the fact everyone that knows me thinks I might have a boating problem.

A boating problem, Thats great, good luck with her, she's one tough condo
Jr.

more than likely it'll be a 1:50. . considering that boat a boat of this size and weight along with the power you metioned will not see any significant speeds ( like 130 mph as in a legacy or gtx), you wont run out of props. and youll need the help to get her on plane.

none the les you should still check with mike.