i just took a set of extention boxes off a cat. it had TRS drives. with steering. i have the whole ball of wax for sale CHEAP. the set of drives , extention boxes , steering , tannys , carrier bearing , and transom rings. did i say CHEAP ?
Go to page 50 of your oct 2002 Powerboat Mag and read about the 2 speed trans inside of an extension box. They are using a Konrad drive but I believe it is very similar to a bravo if not the same. This system is by WPM.