Problems all fixed.
Replaced 16 lifters with Comp Cams lifters. I managed to fish them all in through the openings between the intake and the heads. The only down side was it is hard to get as much break in lube on as I would like. It ran off to an extent by the time I fished it to the proper hole.
I added Precision
Oil Pumps end stands and Edlebrock studs.
I installed everything then started just long enough to get the
oil pressure up. Immediately shut down and adjusted the rockers. Then ran at 2000-2500rpm for 30 minutes to break in the cam and lifters. I did use STP
oil treatment to aid break in.
All noises are gone.
I noticed oil build up on #4 exh and #2 intake lifters. You can see them circled in the picture. Close up shots of them. In addition, I did find some serious wear on the left bank rocker shaft in the area of #8 intake/exh and #7 intake.
Replaced the shaft and the 3 rockers with OEM type Sealed Power parts.
I opted not to go with complete aftermarket rocker assemblies because all but the most expensive have a bushing on the shaft end like the OEM. I see no real benefit. For an engine with a more radical cam or that runs higher RPM I would definitely go with H and S or something similar. That is overkill for this mild engine.
John