If this was an old Detroit design piston with a .400"+ thick crown, then very likley 'yes'. But, these UEM pistons from the Icon and KB lines typically have been lightened up a lot with techniques like taking material out everywhere, including the piston crown. So I seriously doubt that the material is there to take out a .100"+ deep dish and keep anything close to an adequate crown thickness. And the weight would go down by over 40 grams if you cut out 17.5 cc's of AL, so the balance would indeed need to be re-worked.
