Actually what I have "may" be what speedway sells? As you see with my pictures I have two of theses and BOTH had to be modified!!! The single barrel side bolt spacing is about 1/4" ish center to center OFF. I had the "original" bolt holes fill welded, then I re-drilled the correct bolt spacing, re-milled both flange surfaces and had to "relieve" the sides a scoche' so that a wrench or socket fit the mounting nut.