Carter AFB 9636 ?

No, your timing chain is fine.

The only neg. that I have hear about Mopar camshafts-and I just hear this, don't know if its true--is that some are way off and its best to degree those cams. Seems unlikely but I do recall reading it believe on dodgecharger forum a year or 2 ago. I did not agree with all the advice on there, thou.

I have found you can time the motor by ear. Unhook the vacuum advance if you have it, believe not. Rev the motor up until all the advance is out. Ear muffs are a great idea and while reving it 3000-4000 rpms, turn the dist until the motor stops speeding up or starts to get a little rough. Then back it off a bit. That should get you like 35 degress total.

That be faster than checking everything, thats how I time my motor, I still do look after with a timing light but its always right around 35. If you do time it that way, then slow it down to idle and see how much vacuum it has. If its still low....well IDK, you got a vacuum leak or the cam is way off.