I thought Naruto still had all his abilities from before Sasuke's declaration. He still has all the tailed beasts chakra and the six paths senjutsu. Im not sure if its infinite tho. I thought he ran out of chakra during the fight with Kaguya. Can you imagine a 10jin Sasuke tho?! Damn... Naruto gonna have his hands full. He might have to whip out the Sage's tools theyre still floating around.