realdude here is your PBT (passenger booking total for that flight.

First
Capacity 14
Booked 7

Coach
Capacity 141
Booked 169

This aircraft is overbooked by 21. On reward tickets just like said before the general rule is not to upgrade you to first but it soely depends on your gate agent just ask them and see what happens. Inside CO Ewr is not seen as a friendly place but try anyway. This flight has a low now show factor and I am not sure why it is booked over its authorization so it is a possibility you could get bumped. To keep that from happening make sure you have a seat assignment.