That article was either in Classic Trucks or Custom Classic Trucks. They do that mod all the time on 1/2 Tons. They usually use a rebuilt steering box from an 80's Toyota Truck and a custom Pitman arm. If you pick up a copy, I think that you will find a supplier that advertises a kit. The steering column is cut as stated but the net result is a purely stock truck inside the cab.
It is coming up the time of year where magazines publish a complete listing of their articles for the year. This is usally done in Dec ot Jan.