Okay.
Actual draw weight plus five: 63 + 5 = 68.
Plus five for each inch of arrow length over 28" (I'm going to assume an inch of overhang at the front of the bow): 68 + 5 + 5 + 5 + 5 = 88.
If bow is cut to or past centre, plus five: 88 + 5 = 93.
If using a modern, low-stretch string, plus five: 93 + 5 = 98.
Add nothing for 125 grain or 145 grain broadheads. Add five for 160 grain broadheads. Add ten for 200 grain broadheads.
So, if using 125 to 145 grain heads, as 98 is closer to 100, and I believe it better to err on the side of stiffness than weakness, you would choose 100/105# shafts. If using 160 grain heads, you would choose 105/110# shafts. If using 200 grain heads, you would choose, theoretically, 110/115# shafts. However, as your need for spine increases, something pretty cool happens: The difference in actual deflection becomes so little that a wider range of shafts will work. So, you would find that you really won't go wrong with anything over 105#.
As an example of my belief that it is hard for arrows to be too stiff (given a reasonably heavy bow cut to or past centre), I should be shooting 95/100# shafts out of my ~68/69# @ 29" recurves, and I do, but I also can happily shoot 105/110# shafts intended for my much heavier recurve, and they still fly beautifully and kill magnificently.
Now, Surewood Shafts are really the only place to get what I described above.
Good hunting!