I remember now, undo the bolts in the bell housing and support the gearbox from underneath. Undo engine mounts, exhaust etc etc. find a way of slinging motor with chains or straps. I think I bolted the chains to exhaust stud holes from memory. I slung mine with an endless chain and gantry but if you have an engine crane that would be better. Be careful when separating the gearbox that the clutch doesnt foul up with the input shaft on the gearbox as they come apart.
There would be other ways and probably better ways but that worked for me.