Tread of rear axel

Hi, I'm new at this forum, I'm from Sweden an runs a Hornet 51 with a small block chevy. The car has stand behind a barn in California for 40 years 56-97.



I'm looking in to change the rear end to a Dana 44 from a IH Scout, 59 inch widh and ratio 3.07. Do anyone knows the tread of the stock axel?



Thank's in advance.



Nick B