My Cadillac engine bud must be out of town so does anyone know what the part numbers are for some after market valve seals are? The all rubber or other than described "low rent stock seals". I called my NAPA guy but he said some changes were made and the stock type were the only offer as were at my normal jobber. I think they get cracked during install sometimes and it isn't long after that they are sucking oil. The Eng goes in the first one instead of the second. I really should have a point or 2 higher comp to take advantage of LP fuel, would help a bit with the mileage.