According to Autodata this is a 'freewheeling' engine, therefore if you are lucky there may be no damage. You need to put a new timing belt on and give it a try. Unfortunately this means taking off the radiator grille and radiator, alternator belt, viscous coupled fan, and the cooling fan pulley before you can take the timing cover off. Takes a while but it isn't such a bad job. Check out the Autodata website for more info.
John
January 2008