Well, if Kurama sent Naruto to the past, Naruto would probably be really confused at first. But then he could try to change the course of history for the better. Maybe he'd team up with his father, Minato, and together they could defeat enemies that were previously too powerful. He might also be able to influence the relationships between different ninja clans in a positive way.
In such a fanfiction scenario, Naruto might use his knowledge from the future to prevent some disasters. For example, he could stop the Uchiha massacre by warning the clan early. He could also teach his younger self some advanced jutsu techniques, which would make him stronger much earlier in his life.
If Kurama sends Naruto to the past in fanfiction, it's a very interesting concept. Naruto would be in a unique position. He could try to change things like how the Hidden Leaf Village was developed. He could introduce new ideas about cooperation between ninja. He might also have the chance to meet his mother when she was alive. This could lead to some really heartwarming and powerful moments. He could even try to change the fate of some of his friends who had difficult pasts. For instance, he could help Sasuke in a different way, long before the events that led to Sasuke's initial fall from the path of the village.
Chapter 258 is the strongest chapter-level answer because it starts from Just when everyone in the livestream room was immersed in the lively and... and follows through on Is Jiang Li really having an affair with Director Sun?] "[What the hell?.
Chapter 222 is the strongest chapter-level answer because it starts from How come they're even live streaming in a reality show?! and follows through on She was certain and sure that she saw scheming in them..
A practical answer is Chapter 223, because it turns the idea into a concrete scene. The chapter opens with So, for the first time, Jiang Yan, who had always styled himself as the..., adds pressure through He could simply have someone send a flurry of gifts and make some..., and ends on The damned.
The best chapter pointer here is Chapter 216, "I'm the Director, I Call the Shots!". It opens with The production team also took advantage of the situation to start an... and closes on However, the next second, He Yun, who had hardly ever spoken to him,....
The best chapter pointer here is Chapter 208, "Those Who Commit Many Wrongs Will Destroy Themselves". It opens with Jiang Yan clicked his tongue, "What's this about money? and closes on Seemingly sensing the raging fire in Su Yinwan's heart and feeling....
Chapter 257 is the strongest chapter-level answer because it starts from This nation seemed to have a particular love for bright colors. and follows through on Yet in the end, not only did she have no sense of guilt, she even forgot....
The best chapter pointer here is Chapter 220, "The program team actually invited such a high-level boss!". It opens with I know everyone has many questions, and I'm here to answer them one by... and closes on However, Su Yinwan and Shang Shaojing weren't particularly attentive to....
If you want the clearest chapter reference, go to Chapter 250. Early on, The knowledge that several guests were soon returning had fans arriving at...; later, the chapter leans on Among them, Su Yinwan's fans were the craziest..
Chapter 197 is the strongest chapter-level answer because it starts from Seeing that no one cared about what she said, Su Yinwan immediately felt... and follows through on Wen Jiaojiao, aren't you underestimating me?.
The best chapter pointer here is Chapter 234, "Chasing Wind Youth". It opens with Given the vast mystical powers Jiang Li had displayed before, he was... and closes on His voice, intermittent and broken, came through the earpiece: "Sorry, my....