I'm in the process of uploading photos of the interior of the M1A1 turret in the Major Rob's Motor Pool album at the www.armorama.com gallery. I took 40 shots, and they should be uploaded by early evening (EST). Captions may take a day or so.
http://www.armorama.com/modules.php?set_albumName=albun63&op=modload&name=gallery&file=index&include=view_album.php
May have to cut and paste the link url.