After redoing the transom and running the boat all summer I decided to convert it over to a bravo set up.I was wonder what to set the Xdimension at? I would want to go aggressive and wounldn't mind running a 5 or 6 blade. I was thinking between 19-20.5 any thoughts??????

Why would you want to convert from threes to Bravos? The Speedmaster drive is nearly bullet proof. I think a conversion involves moving the engines or adding stand off boxes and drive shafts. A lot of work in any case. I had a 10 meter with threes that ran over 90 mph. If anything I would think about Number four or Fives to raise the x dimension. The Three drive tend to be deep in the water.

I know what is involved I did it before. The problem is that you can't get parts for it. If i had big power maybe i would keep it but with small power and on the resale side i'm better off with bravo's. I had my three mounted real high. here is a pic. Just want to up dated the boat now.

I thought there was an aftermarket company that makes 3,4,and 5 gears and shafts to Merc specs.