This is the wrong way to do it but it can be roughed in on coach. You can't really set the input torque but you can set the on center preload if it's that bad and make it drivable. Not condoned. Engine on and box on center rock the steering shaft 11-1 o'clock and watch for Pitman arm delay of response to movement. Un jam the jam nut and tighten the Allen 1/8 turn at a time till the delayed movement is gone. Back it off till you are at just at the no delay point and tighten the jam nut. It is very easy to over tighten allen and ruin the box. Pull the box when you get home and do it by the book. Again I never told you this.