1st your would need another person. If your plank were longer and strong enough and you had a high enough fulcrum, you could make a see-saw . Securely !!strap the block to one end of the plank have someone stand on the the other end then back the xterra up, rest the block in the back. have a beer. Or strap the block to a skateboard with a teather one end to pull from and another person pushing it up the ramp.
Its late, I know you probably have figured out already.