NHRA rules require SFI-approved five-point harnesses for cars running 11.99 or quicker in the quarter-mile. With the seats bolted down, the RCI harnesses were snaked into place. The lap belts bolt to the factory seatbelt anchors, while a new hole must be drilled into the floorboard to attach the crotch strap. The RCI belts feature 3-inch webbing all around. Note the kink in the door bars necessary to clear the seat bolsters and door panels.