Bad audio quality, sounds like a rod. Seems like too much noise to be valve train. I'm assuming the motor has spent a lot of its life in some higher RPM's? What oil are you running? Valve seals don't make noise, they just cause you to drink oil. (Open the oil fill with the engine running, if its pumping out tons of smoke, your seals are either case, still sounds like Mr. Rod wants to come out. Time to go pick out a casket. . . or a 100 shot!