Don't feel bad. I have hunted a leak that drips about 5 drops a week on my floor for 30 years. This has been going on since I bought my 69 Torino Cobra brand new and it still has the original tires and just over 40K miles on it. I have used dye, completely dried and cleaned the bottom of the car so many times all paint is gone and I had to repaint it, and had numerous mechanics put it on a lift and try to find it. Replaced all gaskets and everything that I can think of and I still have it. I have came to the conclusion that this particular 428SJC just manufactures a few drops of
oil to aggravate me. I have even put talcum powder all around the side of the block from front to back to see if I can find a break where
oil came down and nothing. Also pulled the inspection plate so many times it comes off really easy now and it is dry as can be inside. I now have a very minor water leak near the front of the intake and if that has to be pulled to stop the water leak I will look at all the gaskets again. But for the few drops of
oil I have always had fall, it just isn't worth all the work, especially since I just slide a piece of card board under the car and then wipe the oil that has dripped over a period of time off when I drive it.
Ron