Pics of my 7-UP Vert.......

How do they fit? Are they available in different offsets?

I have the same brake setup as you and want to run a 17x9 bullitt in the rear, but want to keep the SN95 axles to run ABS later. Do they fit well in the rear?
 
They fit good. I had to flip the quad shocks but that was mainly due to the 275 tire. They come in two different offsets I believe. I can't remember exactly what is it but it is like 24 or 26mm. The other offset is for the newer stangs with like 45mm. I got them from Tire Rack.

When I did my 5-lug, I sold the axles that came with the kit, and got some of the 31 spline Ford Racing stock length axles. So if you are running the SN-95 axles I would say you might have to do some fender rolling. I was almost thinking of running some 18x10 with the same offset, so I think you should be okay running the SN-95 axles. Mine are tucked in real good now. I like the look of them not sticking out.