360 idle tick

Veeeeeeeery easy to tell if it is valve train tick. Forget about listening devices. If you suspect it is coming from a particular side, warm up the engine & remove that valve cover. Lay plenty of rag around & wear gloves [ heat ]. Engine idling, put your fingers on one rocker at a time & see if the noise changes. If it does, you have found the culprit, could be more than one rocker. Do the other side if needed.