Another airplane on our field with 360 just lost the cam and lifter
last month and it caused big time damage while they piddled around
with, "well, lets fly it a while and look at the filter again."... The
lifter spalled off chunks shortly after that decision and the pistons
picked the debries up on the skirts and scored the cylinders... His
'repair' on a 700 hour engine is now $10K....

Pull a cylinder and borescope the cam... Not a lot of bucks or downtime
to do this and you can make an informed decision, not a guess...

denny