The Headless Horseman will soon join vampires on Conyers film sets, as Fox's popular supernatural TV series "Sleepy Hollow" moves its production here. "Sleepy Hollow" will bring about 300 jobs - most of them new and local - with a $4 million payroll to town in two rented spaces totaling around 200,000 square feet. The deal was announced at the May 7 meeting of the Conyers Rockdale Economic Development Council board.