Wrist Pin Oil Hole Info

Doing a stock rebuild on my 340 and the rods have pin bushings but no oil holes, I kinda like the idea of the pins getting at least a little oil so I'm thinking before I have everything balanced I'll add the hole(s). Two different ways I'm thinking of, one hole in the top of the rod or two holes with one on each side toward the top. Any thoughts on which one would be better? What size should the hole be? Thanks