Exterior Door - Jam Placement
Bring the exterior edge of the jamb flush with the stucco. This will make it easier to seal against water. Not sure if exterior trim will be used, but it will offer more protection against the elements.
On the inside edge you'll need to rip a fill piece to make up the 1 inch shy door jamb. Glue and finish nail it to the (2) sides and the top of the door jamb.