My mind blocks any attempt to try and rationalize a setup based on drifting. Seeing as how making big power is not a priority to drift, i dont see how any engine you wanted couldnt be made into a "drift engine". From what i gather, something reliable that has enough torque to break traction on command is the criteria. RB26 is reliable, it makes a lot of torque.... how quick it spools is completely up to you.