Then mount it up and then twist the drag link both ways. See if there's interference and adjust if needed. Also steer lock-to-lock and see if there's interference.
E450 does not have a Passenger side Idler Arm. Because of this, the Driver side, attached to the steering box Pitman Arm, does not rise and fall with suspension movement. The Passenger side end will rise and fall in unison with that front wheel.
The instructions for the functionally similar Safe-T-Plus don't include anything about the drag link, and mounts the same way. S-T-P uses two opposing coil springs to push steering toward center. Reflex uses one, so it's in Push/Pull (Compress/Stretch) modes to find center. Which is why instructions stress having the steering wheel locked on center during installation. There's a YouTube about adjusting an S-T-P so it holds center, not pushing it to right or left.
