Ok, I couldn't resist. I tore mine down. Once you are as far along as you are, cam rod out of plunger, slip a long pin down the hole in the top of the block and drive the plunger down. It should move about a quarter inch before the bushing pops out. Not a lot of force necessary there. I removed the pin from mine, and can see no reason to do so other than to avoid bending it with the pin used for driving. A little extra care should avoid the need. If you decide to anyway, rotate the plunger 90 degrees and drive the pin down into the cavity the cam rod normally resides in.