I would call HB, they should defiantly have the answer. If not just call over to Power Tech, they have the greatest customer service and will help you find a prop that does what you want it do to.
You will want the answers to these questions handy when you speak to HB and or PT.
What Model / HP Engine?
What is your current Prop Pitch?
Is it aluminum or SS?
What are you currently getting in RPM's and MPH with a normal load of gas and gear?
What are you looking for this prop to do?