57 chevy rear end width

What is the width of a 57 chevy rear, drum to drum?

i just measured mine,it looks about 55 inchs:LOL:

55" would be backing plate to backing plate, stock. Flange to flange on the outside of the drums is 60". Here's a chart with most popular vehicles. http://www.teufert.net/other/rear%20...dimensions.htm

Thanks guys!