Reverse shackle + SPOA

[firemansam]

I currently have the calmini 3.5" shackle reverse fitted. The kit provides superb flex, despite the spring being rather hard.

Im thinking of going SPOA for clearance, but i think that, coupled with the 3.5" would be way too much lift, and be unstable. I can ditch the 1.5" lift springs in favour of stock height springs, which would bring my overall lift to 7".
im curious about propshaft angles, and brake dive.
my question is, has anybody done this before, and what are peoples opinions on the matter?