The adjustable draglink may have fixed this for you but here's a little tip on push pull steering. Since you said that the steering wheel was not straight when you upgraded you may be off of center on the box. If you are off you will one not have the same left to right steering by up to a 1/2 turn on the steering, what that means is not only will you be able to steer harder one side over the other but yes the box is not in the neutral position. This is very important to the stability of the steering. You will be in the power mode for the box and it will always try to turn. The fix is to drive your truck forward straight ahead into a wall.... no seriously make sure your wheels are perfectly straight then pull the tie rod with the ends, turn your steering wheel straight and reinstall the tie rod without turning the tires. Adjust the ends as needed to complete the install. You will also need to check that there is no more than 1/8 difference on the tires front to rear (rear being wider) /--o-\ from the center of the axle on both the front and rear of the tires. Doing this can also eliminate some woble.
