Waar wrote...
Code Geass 1/2
=P CG is definitely the best!! rawr!
Anyway, back on topic:
All of naruto's impact skills will not work on luffy (im pretty sure rasengan would just twist/stretch luffy and maybe get him dizzy but thats about it). However, rasen shuriken and his shurikens/kunais can be effective. But with that said, luffy has got alot of attacks of his own too, and gum gum gattling punch would instant-kill all of naruto's kage bunshins.
Both of them (mind you), have very high stamina and never seem to fall under any circumstances, so its gonna be tough if you were to put it as a battle of stamina.
In the end, id say naruto would win mainly because he still has a chance of triggering kyuubi as he is about to lose.