Sorry if this sounds blunt, but...... a 26' Wellcraft, blown BBC, 3 BLADE PROP
Put a 4 blade Bravo 1 prop and the cavitation will go away. The blower creates large amounts of torque at low RPM'S. Just when the boat rolls over is when the torque curve comes on strong. If your trim system isn't working properly get it fixed of course, but it will still blow the prop away with a 3 blade.
just my .02 of course