gmguy,
For what its worth a few years ago my son bought a '80 AMC Eagle with a 258. The car had sit for 3 years and after we got it started it had a miss. After replacing plugs and wires it still had a miss. Pulled the valve cover and found #3 cylinder
exhaust valve push rod was bent. It turned out the valve was stuck. A small brass hammer and a short bar along with some WD40
cured the problem.
Gordy
