any prop shop can help you. There is a formula they use that I do not
know. Sometimes they have your hull dialed in already but other times
they will need LOA, BAW, Real weight (not what the factory says but
after all your stuff is in it) and a few other numbers.

When I repowered, I repitched my prop after about 100 hours of useing
the original. The change of a little bit (something like 1.5) made a
400 rpm drop for speed so it is worth doing.