TD cam wear check?

[Dave Houser <mgs4dave@warwick.net>]

How can I check wear on my cam? Looking at the valves come up by the
rocker gear seems very unscientific as proving a definitive cam wear
problem.
Looking at the cam because my poor TD with 50,000 miles(but over 31
years) was very down on power last weekend after a club outing.
Compression is #165,130,125,130. Oil pressure 45# hot.
Could I be getting some valve recession in head?
What's the cure?

Cheeers,
Dave Houser