Aren't the factory street glide shocks 1" shorter?

By the way changing the angle like that also effectively makes the spring softer in how it interacts with the articulation of everything else. This may or may not be an issue for you depending on how much weight you ride with. If you do go this way you'll want to take one or two clicks out of dampening settings compared to the factory orientation if you're using that as a settings baseline.

 

I would be careful, in the picture of the left shock the spring looks bowed out to the rear and closer in the front, meaning the adapter is hitting on the bottom front of the shock. It will bow more with weight causing the spring to rub on the front side of the shock body.
I have fist hand experience with this. Had a similar kit, looked good sitting there but after riding for a week I started hearing a squeak.
Inspection reviled the spring had rubbed through the paint on the shock body.