It seems like a lot of my sunchokes are right next to each other, and I have about 3 feet of room. should I pull some up to move them a few feet so they all have room to grow?
They will sufficiently spread when they will be tall. Let them grow as is, and remove some if they are too close to each other.
But I doubt it would be a good thing to transplant the ones you will be removing in the process. There is various sites where the explain how to grow them.
Here they say its more an issue to contain them than to spread them...