...if field length is an issue?
Can only come to think of one scenario in which this applies - an uncontained fire where it has already been determined that a go-around is no longer a possibility.
Even then, putting yourself in a situation where you might not have power to drag the aircraft over the fence is probably not such a hot idea. Methinks it would be better risk management - especially in high headwinds - to fly at the correct flap setting and then accepting the 40 kt. overrun at the end of the runway.
It's good practice to brief for both emergencies with time and little time available - and flying around with the wing on fire
is not really that much safer than landinging back on a runway that you know is too short single-engine at your current weight - and accepting the overrun.
But then again, that's just this punters view
- so don't get overly excited!