I have a new-in-box UEM Icon premium forged piston kit for a 416 stroker. ( +.030 340 ). This includes the pistons, pins, and rings.
I had to go another .010 (+.040 ) with my engine so I purchased another set.
Piston p/n IC744.070 , rings 4000BD8.070 Normal retail is 843 +/- plus tax ect...