1) Does the vehicle have a definitive pull or is it a drift? If it is drifting try adding 30 minutes of caster lead to the right side and see how it tracks. I am not certain if this has been suggested at anytime but worthy of trying if it has not.

2) If your left front was subjected to an impact strong enough to create the amount of damage stated, you may want to consider a new steering box.

Hope this helps.