Sure do: http://www.reiderracing.com/ford9c.htm
To address your concerns on the pinion shaft diameter. The reason why the Dana (and other) units need such large shafts is simply because they are being axially loaded with support from only the rear pinion bearing. Common slang would call this "single shear". The 9" pinion head is supported from both the rear pinion bearing as well as the rear pinion support bearing and housing on the opposite side of the pinion head ("double shear"). This additional support prevents much of the pinion head deflection that causes torsional failures of pinion shafts and tooth breakage.
Also keep in mind torque multiplication. The pinion shaft only receives what the engine can give it, and the axle shafts have to take the torque as multiplied through the gearset. Just another reason why it doesn't have to be as big as it would seem at first glance.
Again though, as we have already agreed, each have their strengths and weaknesses and one's own judgement can determine what suits them best.
Stokes if you are only going to run 5.13s why not just pony up for the good Nissan gears and drop a lock-right in it? Right now I am running a Detroit in mine, kicks ass. Much less work and hassle than building and swapping in another axle. I guess one advantage could be if that is your DD, you can build the other without any downtime on your truck.
Do you post on any of the Nissan sites like 4x4parts, NOR, NOAS, or others?
