get an engine crane, remove the center consol and drop a strap throught the hole in the tunnel round the gear box and lift to take the weight. remove all the bolts, prop shafts ect then pull the box back once it starts comming away from the engine lower the crane a little untill you can slip the box out then lower it to the floor.
replace clutch ect lift the box and slip it back in ! if you have used a clutch aligning tool it should slot straight in. bolt back up ect job done ! its awkward and can be a right pain but it aint hard to do.