It is called hemi tick and there is two causes, exhaust bolts or lifters. Use your search button, tons of stuff. I have a different take on yours, when the sound almost is ahead of the engine like that, my guess is exhaust bolts. Get under engine and check exhaust bolts on both sides. If it is lifters, look up redline hemi tick thread and lubegard biotech hemi tick thread as well as oil filter thread, there is science to why those have been proven to work.
After a trip when engine is good and warm, is there any tick at warm idle?
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