A Dialogue Chapter that explains backstory. Is it a good idea?

I have the opposite problem - a back story to one of the characters told in dialogue which is one of the best exciting and atmospheric action bits in the novel so far (55k words) - James Bond style adventure in the alps. The only problem is it is 10K words which breaks up the main plot too much. I can’t chunk it throughout as it only relates tangentially, however it does provide quite a lot of details about the world of the novel, and character development of a main character and a subsidiary character. I’m putting off the decision about what to do about it until the rewrite, or maybe until I give the novel out to beta readers - see what they think about it.

/r/writing Thread