<VV> bell housing bolt w/ saw mark

[Williams, Rickie]

Tonight while detailing the bell housing bolts for the raffle car, I
discovered something that I think I have seen mentioned here on VV, but I
forget the particulars.  Of the seven bolts, 2 are longer and are for the
starter.  The remaining 5 have a special head.  One of these five has what
appears to be a cross between a screw driver slot and a hack saw mark in the
threaded end of the bolt. I have never needed to use a screwdriver to get
out any of the bolts, but assuming that this is a factory bolt, which hole
did I take it out of?

Thanks,

Rickie Williams
Columbia, KY