I can't speak to the specifics of how to time the cams, but if you got to the DIY section and look at the M104 headgasket replacement article, Steve Brotherton mentions a little about it.

The intake cam has variable valve timing on that engine. It can in either one of two positions. Either with no valve overlap or advanced 30 degrees.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record