What is the best way to find TDC on an '03. I know the damper is marked but where is the reference point to that mark??

 

12 oclock. straight up.

 

If still not 100% sure. Remove front (#1) valve cover, move mark to noon position (Straight up) and both your intake and exhaust valves should be slightly loose. If both are not, rotate motor 360* and check again. Both should be slighlty loose.

 

What is the sequence for the valves?? Tell me if this is right #1 TDC Intake 1,2,4 Exhaust 1,3,5 then rotate 360 and set the rest?

 

Here you go, this should be very helpful to you.

https://www.dieseltruckresource.com/...n&onlynewfaq=1