Pulled my 408 out of my Duster yesterday after running a couple of new bests (9.74 and 9.73) as I had low oil pressure at idle and a couple of cylinders with bad leak-down numbers as I had some alcohol carb issues that lead to washing out my ring seal. While I have it apart I am going to drill and tap the oiling hole in my edelbrock heads so I can cut back on the amount of oil getting up top.Thinking i will start out with about a .065-.070 orfis hole. Have any of you guys done this and if so what size feed hole did you end up with?