FlameDragons.com is a cool site were you can get info on a unit, the Flame Platoon, HQ Comp., 1st Tank Batt., 1st Marine Div. Its a website set up to sell a book on the subject but there is quite alot of info there on the subject as well. Including specs on the Shermans used, and some cool pics as well. Check it out here -
http://www.flamedragons.com/index.html