I had a friends dad build me a crate. I shipped to PTS and shipped it back.
It was 150 to ship and ship back from Topeka, KS to Wilton, CA. It took 2 days to get there.
Weight, i'd have to look at the paper work, but it is around 150 pounds with crate and all.
I would make a crate!!
No one can screw with the trans (someone may scrape it) Also when shipping back to you, if you buy a converter they can put it in top of the trans case and between the top of the crate.
Also when shipping in a crate, take two bolts through the wood through the bellhousing. Then take a 2x4 so the tailhousing can rest on the board.
I can take pictures if you really want and get direct dimensions.
But you can use a crate to protect the trans, or use the pallet and worry about people screwing with it.
-Adam