If applicable, remove necks and giblets from chickens, and reserve for another use. Pat chickens dry.
Sprinkle 1/2 tsp. salt mixture inside cavity of each chicken. Rub 1 1/2 tsp. olive oil into skin of each chicken.
Sprinkle with remaining salt mixture; rub into skin.
Place chickens, breast sides up, facing in opposite directions (for even browning), on a lightly greased wire rack in a lightly greased 17- x 12-inch jelly-roll pan.
Bake at 375 for 1 1/2 hours or until a meat thermometer inserted in thigh registers 18