I have read many posts about swaping to disc brakes. Some say you have to change ball joints, some say tierods. Is there a year that nothing has to be changed and if so what are the parts would I need off of the part truck. Thanks  

73-87 are all the same with the later being metric. They will bolt right in the 60-72 trucks. there is only 7 or 8 bolts on eather side one has to be redrilled. You can change them in a few hours. Insted of munky around with all th ball joints and tie rods and the parts will be all the same year for the front.