Yup, need more specific info, SCR, head info, cam degreed or not, timing chain setup, etc.
It does sound like maybe the secondaries aren't opening up.
Balancer marks/slip is a very good bet too, especially if it's OE, or even an OE replacement.
You could be 8 degrees off or more on timing if it slipped.
History of the engine would help too.
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