first of all make sure you got the the bits to do it, driveshafts, sandwich plate, flywheel cover, and rear mount ( LSD specific parts) use a piece of wood or something if you hold the engine using a jack, sumps are pretty soft metal couple of little thinks like starter motor off, earth strap, speedo cable and gear linkage cable come off before you start undoing gearbox bolts i would leave two bolts from the gearbox to the engine a little loose, then undo mounts and take the the last two bolts out after properly support the gearbox. prevents damage to input shaft