In the Acme line, the 470 is your prop in a 3-blade. It is the replacement prop. This assumes the 351 (270 hp motor) and RH rotation. If you are heavily weighting, then the got to the 654.
In terms of performance, I doubt you will notice a difference between the 3 and 4 blade props on your boat. With a GPS and instrumentation, maybe, but most likely, you will not notice the difference.