Why would you use those?
They're not for Nissans AT ALL (Chevrolet). They're not the right thread pitch either 12x1.5 Nissan is 12x1.25.
Like, why did you even have them in your possession?
http://www.summitracing.com/parts/ARP-100-7708
Drautomotive has NEVER done me wrong. I've used his conversion hubs for over 4 years any time I had a problem, he took care of me.
I'm only leaving this thread up so I can reply and show how incorrect you are.