Does your car seem to smoke more right away when you start it in the morning or does it just always smoke? If right away in the morning you need to look into new valve seal. If all the time you need to look at a new bottom end. Remember to if you end up putting a new head on and that doesnt cure the smoke the new head will usually cause piston rings to go out even fast. Your best bet might be a swap or possibly another used engine of the same kind. Hope this helps!