Plan C - You could enter Spain, leave Spain prior to the date stamp in your passport and go to a non-EU country, like Morocco. Be sure to get your passport stamped upon exit. When you re-enter Spain as a tourist, be sure to get your passport stamped with the new tourist time period granted. You may have to fly from Madrid or Barcelona (non-EU airports; not sure). One trip (cheap flight, or stay for a week with travel agency promotions) might get you the 8 months in Spain you desire.
I haven’t tried this, but it worked for friends in China when we were there in summer of 2005.
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