Go ahead and get the full spring pack, get you some new brake lines and 31s. When you go bigger youll already have the brake lines. Dont say you wont go bigger.....it always starts off with a lie and it doesnt stop. as far as the tcase drop with a 3'' you might need it. Some jeeps do fine without them and some dont, Ive lifted a few 97-99 xjs and 3 of them needed the tcase drop just with 3-4'' of lift. But every jeep is different.