Mike, If you have trim tabs make sure the bracket is set lower enough to get below these.
Also use some 18mm ply as a backing plate to the bracket to 'beef' it up as the position to be fixed to is quit thin.
Regarding the make of bracket, all i can say is try to get one with not to much play in the spring when not in use. I.E i use a 5hp Honda and get a fair bit of play, bouncing (bracket from Warrior)
Gary