Quote from: Chryco Psycho on Today at 07:02:33 AMThere is a set screw inside the advance unit that can be turned to limit the advance which I often adjust so you have more timing at idleHe tried several set screws in the opening and concluded that it was a fixed (non-adjustable) vacuum module. Did those electronic distributors come with adjustable vacuum units? Mine is from an electronic conversion kit that was bought in the late 80's, early 90's.