Carb Adjustment?

[BigFishBobby]

Here is my diagnostic so far:

1) I have heavy exhaust (not smoke, although it looks like smoke ONLY on humid nights).
2) I am not burning oil or losing water.
3) During the day I have a strong exhaust smell from the tailpipes, but no smoke.
4) I bought the truck from a guy who lived in Ga. who bought it a couple months prior from a guy in N.C.

Is it possible that due to the altitude change from NC to here that I need to adjust my Carb? Is it possible that is my strong exhaust odor problem? Is it something else completely?

Thanks in advance for the input.