I’m actually going to be a bit different to everyone and say you can actually play Torchbearer in the manner you describe, you just got to think of Turns and the Grind as scenes(though the grind may make not much sense in a more narrative focused game since it is meant to be the clock of a dungeon though maybe you could just say its a natural clock for people).
The only thing I will say is there are certain things you need to be aware of, players need to get money because thats one of the major cycles of the game. Your poor get money, go to town, become poor again because you had to spend it recovering and buying stuff, so you have to go out and get more money. That loop is the most important part of the game so your adventure, narrative or whatever has to have treasure as part of it.
To be honest the machanics aren’t that difficult to grok, people say what they do and it connects to a certain skill, that skill gives certain amount of dice in a pool, they have to beat a certain obstacle using those dice. If they fail either a Twist happens(suddenly ogres, your stuff is broken etc) or you get to do it but the fact your doing it gains a condition(angry that your stuff is taking so long to fix, exausted that you had to climb that cliff etc.)
But yes I kind of agree with everyone in that Torchbearer is not Burning Wheel Light, it is not even like Mouseguard. It is its own game that does its own thing(very well I might add) and if you do something else with it you are essentially hacking it. If you are fine with hacking then great carry on, but please be aware that if you say you want to GM Torchbearer people will have an understanding of what that is. They might be dissapointed when they play your game and they don’t get what they were thinking they were going to get,