The TSB number is 98-25-14. It details how the arrows on the back side of the cam sprockets can be mismarked by as much as 30°. It goes on to describe a method for verifying engine timing by counting chain links. It does NOT describe how to time the engine.
You cannot go wrong if you line up the colored links on the chain with the marks on the front of the cam sprockets and the mark on the crank sprocket. If you do this, the engine will be correctly timed every time. Don't even pay attention to the arrows on the back of the cam sprockets.
