How long is the tap root? When we plant them, we always try to have the tap root planted straight (and going down). Of course, the pine trees that we plant are not nearly this big. The ones that we buy and plant normally come in a big paper bag.
At this time of the year, I'd leave the burlap on it. Taking it off could create air pockets in the ball and loosen the dirt which could harm feeder roots. With conifers, you will not see these symptoms until they are graveyard dead. I would be sure to cut any and all twine from around the stem of the tree since some of the twine they use does not rot as quickly as it should and could create problems. Even with the burlap on, be sure to get ALL the air pockets out. With larger stock, this can't be stressed enough.