Yes, that hole is metric back by the alternator attachment point. I believe you are correct about it being M14, but I can't remember the pitch for sure... Wish I had finished the engine R&R tapes before starting this new job.
http://www.bnmotorsports.com
"And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my CEG brothers. And you will know I am the Moderator when I lay my vengeance upon you."