The cam sprocket bolts on my XK motors were drilled and wired for 
safety reasons. A pain to wire in but the alternative doesn't bear 
thinking about.
The picture shows exactly how the holes should be drilled.
But you need to use a cutting oil to enable drilling at an angle.
Dave G.
> > I have had a tool like this for drilling safety wire holes in nuts
> and  the heads of bolts.  I have never been able to use it
> successfully,  always breaking the drill or dulling it to uselessness as it
> abrades against the angled flat.
> >
> > http://tinyurl.com/3y83tx
 
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