Buying the tool off of Baum tools or another specialy tool source. Not a tool truck tool really. Around 2000 is when they switched to dual vanos depending on model. Post a pic of the valve cover and I'll tell you.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.