I read that cast pistons had better lifespan than forged piston but those WSM almost make me change my mind. A lot of place I read "All I use is wiseco", it's what i have and I feel going another route.
Debating pro-x, wsm (cast and forged), and wossner.
How many hours did you ran it on in 6 years ? Also the top of my piston were a LOT cleaner than that with 32:1 hypertech SSS oil. Don't know if it's supposed to or not.