I feel your pain. 176 miles and had a thin wall rear it's ugly head and coolant in the oil. I had to pull an engine out of the vehicle trying not to damage a 15,000 paint job. #6 had to be sleeved. I cut no corners and even spent the money to have it ran and tuned on a dyno. I hope it doesn't turn out to be a rod, but that sound certainly makes me think it's a rod.
-Keith