Denny, for a piece of mind you can take an hour or so one evening and pull the valve cover and rocker assembly and put new seals on. I have the little "gizmo" tool that you can put over one valve at a time and suppress it, pull the keepers and spring off and slide an umbrella seal down over the stem, put the spring back on and un-screw the little gizmo tool. I'm sure you've seen what I'm talking about. Once when I did it I put the rocker assembly back on and didn't even have to re-adjust the valves! Now that was luck.
Hey, back then I didn't have an air compressor and had to bend a piece of wire to stick in the spark plug hole to hold the valve up but hey...it worked!! Just a thought!
