I have the head off my 89 and in peeking under see I am due to take some pits out of the exhaust valve. I need to say right now I have been a do it myselfer since I was about two years old. I reasoned the rocker arm needed to go so there would be room for the valve spring to release, and so I set about rigging a puller to get out the rocker arm shaft. One came easily, but the exhaust has so far not budged, to the point of stripping out the threads. In addition the one rocker arm does not pull out over the valve stem. I would assume this means it comes out the camshaft hole, but how does the cam come out?