Is the flywheel off the engine then? If not then its just the clutch and cover plate your going on about, fix the clutch and plate to the flywheel first, it needs centralising use a deep socket or an alignment tool, do the plate bolts up to specified torques, then slip the box into the clutch and flywheel, its a squeeze on the n/s due to the inner wing area, ideal way is have the car on stands and let the engine sit at angle to aid getting the box in, once on theres loads of room to level it up, look at all the mounts while your at it too, if they cracking at all you may as well put some new on save the ball ache later, pretty simple job really if you've done something like this before, better to have two pairs of hands though, like most jobs, good luck
