I've been debating on milling the heads since eventually I plan on pulling the engine. I was just doing a cam, head swap with the engine in the car to boost the power. Right now it has a Mopar RV cam and it's pathetic on power output. I've been considering the head milling because with the thicker gasket, decreasing the compression even more seems like going the wrong direction. I was eventually planning on pulling the engine in a couple years for a proper rebuild with a stroker crank. Right now it's getting a Comp XE268 cam, 440 Source heads, Performer RPM intake and 1.6 rockers. I'm just considering my options at this point.