The combination looks good, it is rather on the high side 1.07ish. Personally, I'd back off on the Black malt a bit and up the Crystal. Didn't check the IBU numbers.
I'd drop the bittering combination, just do one or the other and you'll probably want to go for at least 1.5 oz at the bittering. That should get you at least to 25 IBU which is way on the low side for a Porter, especially one of that strength. I'd probably put 2 oz in at the bittering, .5 oz Amarillo in for flavor, and the Fuggle at the end.