It's usually easier to do a job like this on a two post ramp. You will need to remove the driveshafts, and so be prepared to catch the gearbox oil that will spill. You may also need to remove the front subframe, but bear in mind that when you do there will be nothing to hold the engine so make sure you have it adequately supported otherwise it'll drop. Make sure the new clutch centre plate is aligned otherwise you'll have difficulty getting the gearbox back in.