Yep that is it unless it is ported but it isn't marked. Shop was surprised as well. Bought the car used so not sure which is why i wanted it baselined.
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So recently i developed this tick/clicking sound. I tried the listing to it with a stethascope, but can't isolate from one side of engine or other. Seems to come from the middle. I have taken to a couple of different people/shops and gotten everything from:
"Thrown a rod"
"Lifters"
"Timing...