Wrist Pin Oil Hole Info

Mmmmm.. the holes have to line up with holes in the rod bearing shells so I would assume that the drill has to start from the inside of the big end bore. The hard part will be figuring the angle of the hole and making the drill start and follow that angle. IIRC, the angle is not perpendicular to the big end's hole bore. You might have to start a bit larger hole perpendicular to the bore so the smaller drill has an edge to start on.

FYI, make sure your 2nd ring and oil ring fits are good. Sometimes (not always) this extra oiling leads to more cylinder oil consumption; some of it ends up on the cylinder walls and the rings have to control that.