timeing 3.9 magmum

what is the time ing ment to be set on a 1994 magnum?
base timeing ? plz help me asap

The Timing is not adjustable, don't attempt to change it by turning the distributer b/c it doesn't adjust the timing it only distributes the spark the computer sends.

but the marks on the timeing chan what ones do u use? and right now it runs like A@@ and it run the same now that5 the new chan is in backfireing? the heads have psi in the 180 for each one so?