I need to check and advance the IP timing a little on my 606 turbo. After installed new Bosio nozzles I get a little bit of a ping under acceleration. The manual lists the RIV method with the fancy test box thing. I have the AB light tool. I installed by AB light and rotated engine around to the point where the b light comes on and now both lights, but there appears to be no pointer and no timing marks at all on the damper. What am I missing? Did they for some unknown reason get rid of this seemingly necessary feature on the 606? How do I know where TDC is at the crank?