340 0.060 (4.100) forged piston options?

Yeah, +.060 means a non-shelf piston for any of the decent manufacturers regardless of the stroke. Just spend the coin and be done with it. You're only talking 3-400 bucks more and then it's done. Set them up in terms of deck hieght for where you need them with the heads you want down the road. Let the static compression land where it may.