[J Persons]

There was a post on FFCobra a couple of weeks ago about a guy that ruined a set of heads when he drilled the steam holes. It seems that the holes he drilled for the end cylinders entered the exhaust ports and when he tried to fill with coolant, it started running out the exhaust ports. Personally, I would seek the advise of someone like Gordon Levy or someone else that is knowledgeable with this design before I started drilling the heads.