From my experience dating back to the 60s and my old 3/4 ton, the parts I used (front wheel bearings etc.) were for a 1/2 ton.
Chris I would check further before spending $600+ on this. It's been 40 years and memories fade and Steve may be right. I just remember buying 1/2 ton parts for the front brakes for my 3/4 ton. For my current 3/4 ton I avoided all that by replacing the front suspension with an IFS.
