[desertdeer]

I should have said. It is a rod knock. It was my grandpas truck I was given when he passed. I guess in his old age he quit doing maintenance because it was 5k overdue for an oil change and didn't register on the dipstick. I added oil and the lifters stopped chattering but I could hear the knock. It stops knocking when I unplug the plug wire that is #2 from the front on the passenger side of the block.

Knocks on accel and you can hear it at idle with a stethoscope. Its a solid knock sound