i removed my commodore motor with the gearbox on it from the engine bay tilting the motor to a 45 degree engine as you jack it up not sure if this can be done on these cars as gearbox is long good luck though
You can't do it that way because you get stuck between the sump hitting the front diff and the bellhousing hitting the transmission tunnel.
i will check the wd21 work shop manual im sure they would list how to remove it the nissan way
Workshop manual method is to remove the torsion bars, remove the torsion bar cross member, drop out the transmission, then lift engine out. Too much work.