Buy a 12 foot #2 pine 2x12, take the tail gate off, attach 2x12 to the truck, walk the crate up.
Use the floor jack to remove both rear tires from the truck, jack the front up and tip the crate into the bed.
Hire criss angel to levitate it into the back.
Find out where the immigrants hang out and pay a few $5 a piece to lift it.
Want some more dumb ideas?
Just rent an engine hoist.