Do you mind doing me a favour before you put it on?

I'm kind of entranced by the combustion chamber shape, so I'd really like some accurate dimensions and so on. I'll copy the pics from eBay, but there's more to it than the pics can show.

If you wouldn't mind getting all sorts of dimensions for all parts of it, I'd appreciate it.

You never know, it's not real hard to cast up an alloy head for a flathead if you make it in two pieces. I might get inspired one day.