Last time I needed to put an engine into the bed of a pickup I simply wheeled the whole thing over, popped a wheelie to get the engine in and then unbolted it. If it's truly a bare block it's probably about 200lbs. - ya can't lift it but you should be able to move it around very easily. If you have to hoist it, do it like you would if you were taking it out of the car - bolt the chain(s) to the block and lift away. Oh, and put it up on an old tire in the bed.
