they were shouldered for 14mm mount
its been awhile but IIRC the holes in the case are different size too, you cant just move the studs, you have to purchase the correct studs for it to go to 009. Last time i messed with one has been 3-4 yrs ago. Guy pinched the bar as the tree fell and it busted the case out around the front stud so we switched it over to 009 mount studs, drilled the clutch cover in the new location and the guy was back on his way.