Timing cases change mid 00 year along with all else..... only 2 variants of parts but they CANNOT be interchanged. Timing cover or cam will need changed, change cover and run 01-02 computer, or change cam and run 98.5 to early 00 computer.
If you need correct parts I have anything you need.... just trade me
Turboram is dead on with everything he has said in this thread. I've lived this nightmare. Suck it up and change the front case. The pump gear is the same dont worry about it. Trust me im a doctor