rockin8402

i have a 1997 fountain 29 step haul with twin 468 big blocks pushing 450hp turning a set of original bravo1 28 pitch props the boat runs 78 mph on gps all day long im looking at changing props to get a little more top end on the boat but i dont want to kill the holeshot because of the depth of the river. any ideas on what to go with? iv also heard imco -2 lowers could make a big differnce. this is my first twin go fast boat any help would be appreciated.