Bought a new boat and with theses drives I am in new waters. Right now i have 3 blade 15.5-29's. The boat runs very flat like no bow lift. Acouple of things, first it has a vaery high drive height. I measured it like half an inch below the bottom.Second they are too big about 400-600 below my rpm range. Third, it takes a while to get on plane. What do you guy,s think i will need? The motors are 468,s making 525 hp at 5500.

Call me when you can.
You have 26 spline shafts so that is a advantage if finding new props become the requirement.
Also, the props you have may have adjustment options to get you close without spending a fortune.

Brett