What to set gap on spark plugs 2000 Ford Expedition?

4.6 L - V8 engine ( .054 inch ) 5.4 L - V8 engine - L and Z engine codes ( .054 inch ) 5.4 L - V8 engine - M engine code ( natural gas .044 inch ) The engine code is the 8th " character " of your VIN according to motorcraft . com