As I enlarge and look at the rocker arms ,the ball-pivot-end that sits on top of the hydraulic lifter bulbous-end should have a "very small ",oil-squirt-port, that points to the rocker arm "rolling-wheel".This is the newer upgrade that directs oil to the rocker arm "rolling-wheel". From what I can tell this is what is installed,by just looking at the pictures. The camshafts can be replaced without having to remove the front timing cover,by inserting the special wedge tool,to keep internal tensioners from popping-out. By removing the rocker arms and do a physical inspection of each one, can the serviceability be determined. As for the hydraulic lifters, the firmness,by depressing the stem end, of each lifter is a good telltale in determining serviceability. However,if you are not doing this repair yourself,for many reasons, and are pay an experienced technician/mechanic to perform the task,only once,,new-serviceable-parts, will probably be required. A mastertech with experience in these 3.7/4.7 engines could probably explain why the cam lobe faces are so deteriorated,(and I would like to know myself). I've now seen videos of these engine/camshaft where there is a slight tracking discoloration on the camshaft lobes,at the edges,but the lobe hardening was still intact. These are my thoughts on this "ticking". I hope that they have helped. Please keep us updated as to your endeavors and success in this project.Thanks ,Mongoman in Albuquerque