Engine through the top, the engine mounting brackets catch the sides of the Rover V8 and IIRC the overfinch mounts are beefed up too.
Box through the bottom, unbolt the crossmember unless it'sold enough to have removeable seat boxs and floor section.
You can lift the engine and box out together if you have enough clearence, FLT and a ramp should do it :roll:
If you can lift the body it's the easiest way, there are less things to remove in truth, again FLT comes in handly.