Thanks for the replies guys, I appreciate it.
I’ve been running Mobile 1, 10-30 since I got the car, with regular oil changes. I've had no valve train noise until recentley.
I was thinking the clack might be a lifter, but I’ve heard so much about the 103 soft cam issues that I assumed I’ll find a bad cam in there. I am going to pull the valve cover this weekend and see if I can spot a bad lobe. If not I’ll try the lifter oil treatment as was suggested. Thanks for the great tip on the oil in the cylinder to verify ring seal during a compression test. I’m going to check out the rings before moving forward on any rebuild. Thanks also for interpreting my compression test results for me.
If I do need to replace the cam, does anybody know if I have to separate the timing chain to remove it? Or can I just tilt it out of there?
Thanks again.