Base means base, that's no SM,KM, BM or BSM for Naruto and No sharingan period for Sasuke. Using the Sharingan is not base since he has to active the sharingan just like Naruto has to activate his modes.
Yes Naruto base stands a chance a chance against 3T Sasuke. Kakashi said base Naruto was on his level if not surpassed him (
You must be registered for see links
) when Naruto mastered his FRS at about 50% (
You must be registered for see links
). Naruto became even stronger after learning to go SM, his hand to hand combat increased and was not only holding off Deva path in base in taijutsu but also defended himself against Omoi and Karui's kenjutsu who were both Bee's students and jounin level (
You must be registered for see links
,
You must be registered for see links
,
You must be registered for see links
,
You must be registered for see links
).
He only got pushed back when saving Sakura but easily countered them in just close combat. Bee overwhelmed Sasuke's kenjutsu and Omoi and Karui call him master
You must be registered for see links
so Naruto knows how to handle kenjutsu. for chidori infused katana, Naruto already learned how to add his wind chakra to his ninja tools from Asuma
You must be registered for see links
,
You must be registered for see links
,
You must be registered for see links
,
You must be registered for see links
,
You must be registered for see links
.
Naruto has speed and timing that Kakashi said was even better than his when Naruto saved Sakura, he was fast enough to save her without being sensed by Sasuke or Kakashi
You must be registered for see links
and
You must be registered for see links
. Naruto have more stamina and chakra so can use high level jutsus right after each other with no difficulty that can overwhelm Sasuke.
Sasuke's fire jutsus wouldn't do nothing to FRS since Sasuke needs to use fire jutsu on the same or greater level to beat it and he hasn't shown any. For Kirin, it is a targeted destructive jutsu, Sasuke have to direct it right at Naruto or else it's useless. Why I say it's useless? Because Naruto isn't going to be finished off by the aftermath destruction. Kirin hit the mountain and would have killed Itachi if he didn't use Susanoo but then why was Sasuke fine even tho he was a couple of feet from Itachi? That's because the damage is done to the target or else Sasuke would have been dead. It's real Lightning and not chakra base so he wouldn't survive it. Multi-shadow clone who use rasengan on the floor to block Sasuke's vision, Naruto did this on a shorter scale against Pein
You must be registered for see links
So yes base Naruto does stand a chance against Sasuke's base and 3T Sasuke with chances of winning.