shipping a transmission

[63burban4x4]

I've been reading so much here about shipping, my head's spinning!

Can anyone offer up opinions on the best way to ship a 3 speed standard trans from Denver or Ft. Collins CO to Hartford CT / Springfield MA area? My son has
an early OD that I could use here. He can crate it up and drop it off, and I can use a business address for the drop, or pick it up at a terminal. I'm not sure of the weight, but I'd guess probably over 100lb, under 150lbs. Thanks for any help!