on the topic of nismo conversions: I am also doing one however it is a '13 nismo front
I picked it up a few weeks ago off Mr. Wolfenstein
I feel your pain on researching all of the parts you need. With the nicer weather here I am going to throw it on (obviously take a pic or two) and then make my final call on what I can and cannot go with out. I have seen the conversions done both ways full replace and the other had some customization to make it work