I have a 1999 4.6 RR and my problem is that my truck pulls to the right and the left and at time when i'm going over 50 mph and hit a bump my front wheels shake bad so bad that i have to slow down its just my wheels not my steering wheel. i'm thinking its maybe because i had my truck converted to springs and added 2 inches to the height. another theory is that i have never ballance my tires or had a wheel alignment maybe my tire rods are loose and need to be tightened and ajusted

 

two issues going on, your steering stabilizer is shot that why the steering wobbles when you hit a bump.
As for the pulling, what sort of tire wear do you have, do you ever rotate the tires. May need to look at the alignment, along with bushings.