another overheating problem

.050" or .060" are very reasonable. With the thicker aftermarket head gaskets, you will still be .03 to .04" better. You'll feel the change in low and mid range; it'll be about .3-.4 increase in CR.

When you get to that point, make sure the timing chain is new and of good quality. With the typical stretch, your cam is likely 3-5 degrees, and correcting that shows up in throttle response and low RPM torque.