Probably .I've taken just the engine out through the hatch so there should be enough room .Bearing should be no issue .
You will probably have to undo the main water pipes as I can see them fighting you but apart from that on an Atmo that should be about it apart from engine mounts ,they should undo at the bottom plate ,
You need to put a trolley jack under the box and lift engine on hoist .Getting it all back in and aligning will be the fun bit
I think Steve Barker swapped his clutch in a night before an event at York in situ .