For Farmington native Cassius Clark, the anticipation leading up to Saturday’s annual Pro All Stars Series Mega-Meltdown 300 at Hickory Motor Speedway in North Carolina has turned to stress. The team for which Clark drives, King Racing, owned by former racer and Canadian businessman Rollie MacDonald, is stuck at the Canadian border with the car and all of the equipment necessary to run this weekend’s race. “They’ve been delayed at the border cross at Houlton since Tuesday afternoon at 2 p.m.,” Clark said on the phone from North Carolina.