Naruto would last less than an hour because he's not the brightest of people, I'd give sasuke 1.5 hours
If both of them worked together (without arguing) then they could probably last half a day but honestly they could get killed by some random fodder level 200 beast roaming around
Even if they don't run into any beast i'm pretty sure that the climate and terrain will kill them sooner or later
WTFFFFFFFFFF are you guys exaggerating? Holy sh*t. Toriko sounds a lot more interesting, if Naruto/Sasuke won't be able to last that long.If they're not used to the climate than they won't last long, maybe one day, and then they die at night.