Took off the valve cover and things look hunky dory. The noise comes from below the rockers, etc. and to the front.

Next in order would be to remove the harmonic balancer and see if the sound persists at accelerated idle (1300 RPM). I might also try to find a good engine man.

Any other more "minor" checks I could make?

Thanks!!!

1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.