Welcome also Gary: This is a common question, and discussed recently over on the 16ga Society Forum http://www.16ga.com/forum/viewtopic.php?t=3527
My position is, unless it's a high condition 'collector' quality gun, why not make it right for you? And IC/IM is a great S. Dakota pheasant combo, whether 'block and drive' or behind flushing or pointing dogs.