Put an listing on Craiglist Toronto under Community / Rideshare.
Explain you would like your engine to ride to BC along with someone
who is already making the drive with a moving truck etc.   Offer to
help load and unload the engine at each end and to pay some money to
help with gas.

It helps if you upload a picture of the engine with something like a
2 liter soda bottle in the photo to show scale.  (not everyone knows
how big a waterboxer is!)  Tie the engine to a pallet to make it
easier to move and more stable.  You can usually get free pallets
from your local Home Depot, just go to the back receiving doors and
ask one of the employees if you can have a used pallet to ship an
engine on.

Don't forget to search CL, you can also contact people who have ads like this:
http://toronto.craigslist.org/rid/246734314.html

And in the US, http://www.uship.com is a neat service for matching
shippers and drivers with extra capacity in their vehicles.