Upper-chest development depends largely on skeletal structure (rib cage) and the pectoral attachments to that structure. Continue to do your favorite medium-grip bench press and dumbbell presses of varying degrees of incline with an emphasis on the 55-to-65-degree range. Focus on the target area by keeping your elbows out and pressing straight overhead, plus a few notches to the rear.
Incidentally, barbell inclines scare me. The rigid bar is tough on the shoulder rotation for most body structures, eventually leading to chronic pain, whereas the individual dumbbells allow a more forgiving range of motion and more accurate targeting.
‘Dave Draper, Brother Iron Sister Steel