Those CV shaft angles are steeper than I would have expected for that kit however the upper A-arm looks fine. It's questionable... I wouldn't go as far as saying "go ahead and install them at 2.8", you won't have any issues" but I wouldn't say don't do it either. What I'd recommend is go ahead and do it, but be aware of the fact that you may snap a CV shaft and if that's the case, they should be replaced with Kore high angle CV shafts.
Curious, what's the measurement from center of bolt to center of bolt for the crossmember drop bracket in your first picture. I'm wanting to know if they're actually dropping the A-arms and differential a full 8".