I have gone through the Keith Black product line up online and did many searches. They do not offer a FORGED 340 piston to my knowledge, although my engine builder sais the shop is fitting my rods with them - price would confirm a forging, and not a hypereutectic.
I have yet to here back from KB, so in the mean time – Did KB produce a Forging for this application in the past? That might make sense. Does anyone know? – before my engine builder punches me in the head for being a pest!