[Trophy]

I sent my case recently to ollies and this is what I did:

Bolted together (to protect the mating surfaces)
Remove studs from ends of case (transmission studs and engine mount studs)
Wrap in plastic (garbage bag works)
Cardboard box
Lots of cardboard as packing (Mine had about 1 1/2" of extra cardboard all around the case)

The above is also how it came back from ollies.