Removing the press in studs is somewhat easy. You need a larger nut that fits over the stud and rests on top of the stud boss on the head. You may need a few of those as you go thru this little exercise. Make sure the top of the larger nut is higher than the threads on the stud. Put the rocker arm nut on the stud and start screwing it down. As it becomes tighter, you will raise the stud out of the head. When the rocker arm nut bottoms out on the threads of the stud, put another nut on top of the first one and re-install the rocker arm nut, and start tightening it down again. Even having gone thru all this, what are you putting into the new heads? You can't really re-use these old ones. Screw in studs should be the way to go. So, I'm taking it that you simply want to remove the studs to save the labor of the machine shop, right? Machine shops are easy to find, too. Any reputable auto parts store could tell you where to go find a reputable machine shop that does car engine work.
