Apply plenty of heat and penetrating oil and avoid the headache of extracting a broken bolt. I will often give dimensions of a fastener. This is usually the size of the tool used to remove them, not the thread size. I may have replaced some of these fasteners in the past and your sizes may be different. In all cases, the dimensions are from memory and may be totally wrong.
All fasteners are metric.
Don't get me started on Ford's choice of fasteners. Place front passenger side on jack stand and remove the wheel. Remove plastic snow shield from intake plenum. Remove the intake hose connecting the throttle body to the airbox. Partially drain radiator at petcock.