I use the yellow 3M also.I use a bit on both gaskets on the windage tray not the pan or block.Let it set up with a few bolts to hold the gasket in place.Then slip it on and install the pan.I did my 65 about 12 years ago.Used the MP gaskets that come with their tray and a Milidon tray.No leaks ever.Dont glue the gasket to the bloc.You will never get it clean if you have to replace the gaskets or pan.On the tray just pull it and use some 3m discs to clean when you change.Rocky