Is Contouring a Good Option for My Overbite ?

I am sure that if your dentist recommended slight contouring of the teeth it would be warranted.  Slight recontouring is performed sometimes in conjunction with orthodontics to help give ideal dimensions for the teeth.  As long as it is slight I think that it would be fine.  Good luck.  

If your front teeth are crowded and pushed forward then contouring or reshaping of the teeth to allow them to move into a better position is an acceptable option. If the teeth could benefit cosmetically from contouring them they should look nice. The only way they will look too narrow is if your dentist makes them too narrow. This procedure is under complete control of the dentist. You may be able to preview the narrowing of the teeth by using a black Sharpie pen to color the tooth structure that will be removed and holding a mirror at arms length to preview the teeth. Remember once the tooth is contoured it will never be the same. Hope that helps.

Overbite refers to how much the teeth overlap, overjet refers to how far in front of the lower teeth, the upper teeth are positioned.  From your description it sounds to me like you might be talking about overjet.  If I understand you correctly, you are talking about creating some space so that your upper front teeth can be retracted and reduce the amount of overjet.

If this is the case, the contouring you are talking about is also known as interproximal reduction or tooth slenderizing.  This is an accepted method to create space for orthodontic tooth movement.  Done correctly it is a very controlled way to reduce the width of the teeth and should be a good way to solve your problem.

Be aware though that I have not seen your situation and everyone is unique.  If you have any doubts, seek a second opinion as Dr. Marzvaan has suggested.