I've restored a couple of Lotus Elan's and during an engine rebuild became interested in the casting of an aluminum weber head for the twin cam. In particular wanted to know where the water ways and oil ways ran inside the head. Researched as much as I could and just wasn't able to find the details I was looking for. So I sourced a damaged head (from the UK) and had it shipped to me. Took it to my local machine shop and had my way with a C&C machine. The results are detailed in the following photos.