Just bought coil-overs.. What else
 

bought KW variant v3 for my 2013 track pack, what else do I need? CC plates to get it properly aligned? Adjustable panhard bar? Anything?

Both if its going to lower it much. Aswell as lca bracket relocation mounts.

MM has the camber/caster plates which you might be able to use, Roush has some as they use those coil overs in their track pack cars. I'd get tall ball joints and bump steer kit. I am also a big fan of the Whiteline front control arm bushings. The stock A arm rear bushing is too soft and has too much movement built in which seriously reduces steering feel in an effort to add a degree of self correcting geometry. I don't think you need rear LCA relocation brackets on a road track car.

From the pictures and installs Ive seen, they v3s come with a pillow ball top mount, how much adjustment would I get at the spindle? once I go low enough I wouldn't be able to properly align for all the camber?

The thing is when you lower a s197 enough the lower control arms pivot upwards. Which causes bind. You will also need an ADJUSTABLE panhard bar to keep the rear axle centered. If you don't do that one wheel will be poking out and the other side will be sunkin in.

Are my stock upper strut mounts going to last? I just read in the instructions they say to reuse them..