thanks Tom,
yes, there seems to be an issue with rhd and exhausts on the turbo version engines, yet I have seen it successfully done by a few individuals, on the net.
My problem is the lack of availability of donors.Turbo 617a's are extremely rare here, otherwise it would be my first choice.
I have a possibility of a cheap om606 normally aspirated but am worried about the complexity
I actually have never seen green beer here, black is the most popular by a mile