I agree with pretty much everything here. I realize I'm beating the dead horse so don't feel the need to respond.
My thoughts are:
- Isn't cam pitting typically a form of chemical reaction? Corrosion, or acidity. Or undersprung valve spring? I've seen where the roller is so worn that it's basically level with the outside of the lifter like the left one below
View attachment 497420
- I feel ticking is a lash / clearances issue - again assuming that the ticking is coming somewhere from the cam, lifter, pushrod, rocker arm section of the valvetrain. (i could be totally wrong)
When you say they fixed the lifters with beefy springs do you mean internally in the lifter or valve springs? (i'm assuming the former).
Found these two videos on ramforumz ( i see hemimann on there too) adding just cause, i'm sure people have seen them. Learning as i go here.
Lifter Comparison (Cut open)
Lifter Galley