I just wanted to add that I took readings from the other cylinders on the driver's side. #7 and #8 cylinders were showing about 25% loss which is pretty good but what's puzzling is #5 cylinder showed only 22% loss and there was also air coming through the dipstick tube. Maybe because it's the cylinder closest to the tube. I did another test on 6 and still get 35% loss with just air coming from the dipstick tube and breather hole. I understand that I should be getting some air through these 2 places to some degree if the valves are doing their job and sealing properly. The air has to escape through the tube and breather hole I would think as there is going to be some loss of air no matter what. The Bon Ami idea is starting to look better. I think that this test is at least showing that my valves are all working and sealing properly. I was told by the previous owner who built the engine to set the valves at 18 intake and 20 exhaust.