Big Block ticking? Flat tappet cam. Normal?

Does not sound good at all. Definitely dead on a cylinder. Make sure your adjusting them at the correct time. Valves are to loud


The proper way to adjust them is

(When the exhaust starts to open adjust the intake valve on that cylinder)

(When the intake is fully open and just started to close adjust the exhaust on that cylinder)


Here is an engine with solid a lift cam. A slight whirring noise is all you here under the hood.