you don't need to remove the bellhousing, starter or arb if you are just changing the box as it has a separate bell housing.
remove the rear prop, gearbox mount & speedo cable. then just undo the 4 big torx bolts that hold the box onto the bell housing & remove the box.
last time I did 1 on my back it took just over an hour, if you got a ramp then about 30 min