I also have X 2 ball joints which lower another half inch in the front so I would probably leave all the ISOs out if I were you. You will definitely want a bump steer kit and caster camber plates as well
My 98 cobra only has 38k miles but I'm in the process of upgrading the whole suspension. I've already got the CC plates and bumpsteer as well. Im gonna be buying the 03/04 cobra front control arms as well and will either go with steeda X 2's or the Moog ball joints.
Love the seats in it man! I actually got a really good deal on a set of 10th's a few months back with like 18k miles on them. of course they didnt look right in my bright atlantic blue cobra. I purchased them to trade for suade 04 cobra seats plus cash on their end. came out a little ahead after it was all said and done. At the time i was wishing my cobra was a different color cause those seats looked amazing. lol