I have fought an oil pan leak for years in my SB 350. I replaced gaskets/pans and used enough RTV to last a lifetime. The pan would always slowly drip from the very back of the pan. I decided to live with the leak and move on. On a separate issue, during hard acceleration, small amounts of oil would come out of the driver side breather cap. The Edlebrock valve covers are not baffled causing the oil to sling out of the breather and slowly drip on the header. The Mr. Gasket baffled grommet that I purchased did not fit my valve covers so to remedy this problem I cut a small hole in a rubber cap (typically sold with valve cover breather grommets). My thought was this would slow/stop the oil from escaping out of the valve cover. This worked but it also solved another issue; the oil pan leak. My thought is that the open breather grommet didn't allow for enough back pressure for the PCV system to effectively work. So when I restricted the opening of the valve cover breather, this provided enough vacuum in the crank case to stop the oil pan leak. It hasn't leaked a single drop since I made this change and I'm afraid to ever touch the valve covers again since it's fixed. Does this logic make sense and has anyone else experienced similar issues?