ERA427, what I think you have is a outer spring with damper. You can get a new spring just about anywhere for that engine. As long as it installed at 1.82 height you will never notice a difference in spring pressure with a stock cam. The original ford number for the spring is C8AZ-6513-B if you are looking on e-bay but it is not a requirement to be a ford spring. As long as the engine is running fairly well I would just change the spring and push rod. Oh yes, change the
oil and filter to help make sure nothing got in the pan.