I have a 1987 410AC, and re propped with 4 blade. It is a big old heavy big, and thought some prop work would make the boat young again. It didn't. Michigan Wheel and Prop are the go to experts. sorry I'm not sure if cupped or non
I think they are probably cupped. Cupping can be done by a prop shop and is OK to add even if it wasn't done from the factory. It's really a matter of preference.