There are two late pick fours on the Delaware Park card today. One encompasses the four stakes (races 6-9) and ends with the Delaware Handicap.
The other begins with race 5, an optional-claiming race for 2-year-olds - you don't see many of those anymore - and concludes with the Grade 3 Kent.
Unless you think you can beat Songbird, the pick four on races 5-8 offers a potentially better payoff.