I'll have a go at scanning some of it at least and linking (when my IT advisor i.e. my son!) is around. I may have to pass the hat around for contributions to the copyright infringement fine!
The man who breathes on them "normally" takes 'em out to 725, but with an under-sized (!) crank from his sub-contractor he fitted a 92mm piston to give "a swept volume of 666cc". I'm simply quoting you understand - not being a mechanic!