Pistons to raise Compression Ratio

I searched and searched so here I am. I am doing a Magnum swap and I am rebuilding the motor before I drop her in. I talked to Ryan from Shady about 6 mos ago, and he reccomended some pistons to raise CR, and they actually would keep the motor close to factory balance because of their weight. Any ideas which pistons those might have been? Better yet, which ones did you use? like to get the compression around 10:1 ish