Easy job but you will need a few pairs of hands orsome lifting gear as you have to lift it quite high to get the engine out of the engine bay.
Pull the pulley stack off the PTO shaft and you are done underneath.
Don't leave the clutch hanging by the control wires.
There should be a pair of lifting hooks on the engine to sling it up with.
The control cables will come off at the carb and most of the wiring will all un plug sround the starter motor.
Pull the fuel line off at the fuel pump and dain the tank.