What is the firing order for a 1984 Ford F 150 49L 6 cylinder?

For the Ford 4.9 liter / 300 cubic inch inline six cylinder :

( 1 - 5 - 3 - 6 - 2 - 4 )

The distributor rotor turns CLOCKWISE

The marked # 1 position on the distributor cap faces AWAY from the engine

The engine cylinder locations are numbered :

1 to 6 , from front to rear