There's a taper difference on both arms. Carlton and I got her all figured out. Like Brian stated, if you use the stock Nissan pitman arm (like with the 'out of the box' Calmini SAS kit) then you have to use Brian's number.

But if you use the Calmini arm, then ream out the hole and use the 3/4 ton TRE. I used the 1 ton steering stuff with the Calmini arm to keep the stock steering ratio.