'49 Ford rearend width?

Does anyone know the width (wheel mount to wheel mount) of a stock '49 ford coupe? If so, what is it?

What wheel width, back space, and tire size are you guys running?

thanks, for the help.

 

I just measured a '50 I have (I'm quite certain they are the same) and it's 57". Also this link may be hellpful:
www.thehenryford.com/exhibits/showroom/1949/specs.html
note the track width of 56" is due to the slight negative offset of the wheels

 

I have a maverick rearend which is supposed to be about 56" (1 inch shorter than the stock one). I'm running some later 15x6" steel wheels that have a larger hub hole in them. My tires will be 670-15 bias plys.