I had a customer bring in an OT Pinto around 1978, car was a '73 or so. The motor didn't sound right, we figured to look over the valve train since the valve cover was leaking. Whoa... someone neatly cut and fit an old bedspread to conform to the inside of the valve cover. The valve train sounded like angry rattlesnakes. He had a relative that was a NY state trooper, he took him back to the dealer with the car, full refund.