Originally posted by Cooker
I purchased a kit from Harold Bowers that I have been very happy with. It is a selenoid that mounts on the timing case (with a bracket fabricated by Harold) that hold the throttle open when energized. The selenoid does not have enough force to push the throttle open, but it can hold it open. Just tap the throttle with your foot, energize the selenoid via a switch in the cab, and you are all set. Cost about $35 and 1/2hr of your time.
Here is Harold's email if you are intersted. -- email address removed --