RJH,
How are you deciding that the days clearly referenced are allegorical but the other details are not?
How are you deciding that genesis 1:14 that clearly states god made the sun, moon and stars on the fourth day is allegorical.
As has already been pointed out the use of the word day in the original language is consistent with the meaning of a 24 hour day not an age or period of time. What exactly in genesis suggests that it not be read as it is written?
What is your criteria for accepting certain statements in genesis at face value and not others? It sounds to me like you are accepting the statements that confirm your existing bias.
The simple fact is that the genesis account is at odds with science regarding how the earth formed (long after the stars and long after the sun) which would suggest that the entire genesis passage is at best allegorical in it's entirety.