tie rod question...size different on each side

yesterday i put the car on the lift and when i begin to change my tie rods i notice on one side (outer) of the tie rods the bolt and insert screw part is bigger. the new ones i purchased are the same on both side so it wouldnt fit properly on the knuckle so today i plan going back to the dealership to return the tie rods. am i missing something here??? should i request a different part. i have an 82 300cd.