Im have a 26, 4 blade I thinking about putting on a 2002 288 sunsation 496mag 375hp..It has a 24, 4 on it now and rpm WOT is 4700-4800 67mph..Is the 24 the best prop for this boat?

Try a lab'd 24 first - if you can. It might give you the extra mph over the stock 24. Or, get your 26 worked on.

it just depends on what you want? all out top end ? midrange cruising ,hole shot? the four blade will surley give you a smoother ride in rough water,I would add a litlte pitch and lab the prop. you already have a good one to work on.