VW Vanagon signals?

[spitsnrovers]

While waiting on delivery of a kit, with metric outputs, I am wondering who else has attached an MPGuino to a VW Westfalia?

I have an '88 waterboxer, fuel injected. I know there is a VSS output from the back of the speedo for the VW original cruise control. So far haven't searched out the best place for the injector signal.

But.... does anyone have any figures from a VW to set this thing up? appreciate any suggestions.