Rocker covers off. Good or bad underneath....?

[mjjrV8S]

So started the winter jobs early. And a big one was to have a look at the pistons to see if the tapping i have is exhaust, tappets or a slipped sleave. So off with heads! Struggling with the exhaust manifolds so they are not off yet but rocker covers and inlet manifold gasket are. It lools quite clean under there but is there excesive wear on the lifters and Cam? You tube vids show badly gunked up heads so either mine or in good shape or the opposite.....