steering problem

ok i have a 1991 camaro rs and i dont know what is wrong. i think it might be the sway bar. when you are driving it pulls hard to the left and i mean hard the steering wheel will be at a 1/4 turn to go straight and when you brake there is no stoping going left. i did notice the sway bar was cracked but i thought you didnt really need them unless you take hard turns. it has been sitting at my gf dads house for like 2 years never put on road and i want to fix it this winter and drag/keep street legal let me know please