[boraxman]

If you got the 71 upper and lower a-arms you may need or want to use them especially if they have the ball joints on them. On mine I was able to swap the ball joints with 71 stlye and use the same a-arms. On the tie rods there is a coupler you can buy that allows you to use 71 outer tie rods and your old outers as the new inners. Again I dont know how different the 68 and 70 trucks are, someone else may want to chime in.