If you really want to hit the upper pec (pec minor), use an angle between 15 and 30 degrees, a wide grip, and a straight line bar path to your clavicle. This can be very hard on the shoulders so you might want to use these on a medium/light day. Also, the delts, tris, and pec major really take over after you are about half way up. So, using those 1-1/2 reps CT just talked about or using only the lower 1/2 of the movement will fry the upper pecs.
In any event, I would not recommend incline benching above a 35 degree incline. I believe the stress on the shoulder is just too great if using any more than 60%1RM. Also, try using an 80 degree angle for shoulder/military presses. This will of course hit the front/side delts hard, but this slight angle will also recruit the upper pecs.