Yes, it is tight, but I managed to do it.
All the ancillaries were removed from the block. I had a couple of jacks either side of the block holding the block in position with a wooden cross member. With all connections removed from the gearbox assembly and one jack under the gearbox, I then lowered the gearbox until it was at a steep angle . There was some manoeuvring and rocking to do but the assemblies are now lying on the garage floor. The only casualty is the reversing light switch fitted to the right side of the gearbox