reuse the old ring gear bolts??????

i was out puting the new 3.91 ring on the clutch suregrip, and the ring gear bolts wouldn't go in all the way. seems the new bolts are larger up around the shank than the holes. the bolts DO fit in the other suregrip (cone-type though).

so

do i clean and reuse the old bolts or break out the drill and run a 3/8 bit through the holes???