Ok I think I heard what your talking about. If the sound is louder from the bottom of the motor, it leads me to think of bearings. I would drain the oil and inspect for metal flakes or a sheen to the oil, just to rule out possible internal damages for now.
Could also be the exhaust cam needing the valves adjusted.
Originally Posted by Zee199969
when the OB's a squeakin' , don't come a peekin'