Thanks heaps people for the ID info. I'm pretty green on the cossie side of things.

I've actually won the bid but haven't paid yet , the guy advertised it as 'looks like its never been skimmed, still measures over 138mm'. From the sounds of what you are saying that's the bare min for that head so i'll be careful to measure it when picking up. So that measurement is from rocker cover face to head gasket surface ?

Anything else to watch out for other than cracks & seats etc ?

I'm guessing the term 'plasticine head' refers to that model being easily warped so needing skimming every time?

And yes I am from Australia.

Thanks again people