You don't need to know timing specs unless your installing a high performance cam and you have an adjustable timing chain set. You didn't spec the moter and there's more than one that comes in your car 3.9, 4.0,4.7, 5.2, 5.9. Tell what motor your working on and what kind of timing componants your trying to install. and I'll help you more. Stock or replacement stock you just line upp the marks. tell the engine I'll tell you where the marks are. If in doubt the intake valve opens between10 and 3 degrees before top dead center about on any engine some racing engines open the intake as much as 23 degrees before TDC but they don't idel smooth and their drivers don't care either.
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