According to Mr N's website:
"Dana never made a passenger side knuckle that was drilled and tapped from the factory. This is a general misconception that the above knuckle disproves. They are very rare but they are out there, so keep your eyes open. So far I only know of one other knuckle other then the one I found. Stamped # RC38618."
I was thinking of going with hydraulic steering, forgot to mention that in the initial posting. So just need to know what steering arm it is I need to purchase.
But thanks for pointing to the site, I already found that one.