Thank you all for your input and suggestions. I truly appreciate it. Tonight I tried a cheap, simple, but probably not recommended solution. I sprayed the valve spring and the part of the valve stem I could see in the strut tower with carb cleaner. Then I worked it in and out with a pry bar, followed by more spraying and prying. Eventually it seemed to return to position faster, so then I loosened the bolts holding on the cam tower so I could reinsert the rocker before tightening the bolts and reinstalling the valve cover.
At first, it still ran on three cylinders. However, after idling five minutes, cylinder #3 came back! I went for a 10 mile drive or so, and all four cylinders were humming along.
I don’t know how permanent of a fix this will be, but I can always hope!
Again, thank you all for your input.
I’m sure it won’t be long before you hear from me again with more questions.
Brigham.