DBro, Unless I'm mistaken you will find most all "I" beam straight axles have a wheel cut of 49 to 50 degrees. The only exception I'm aware of is the new Freightliner FRED chassis with the Hendrickson straight beam axle which has a 55 degree wheel cut. You will find most all IFS (independent front suspension) axles have a 55 to 56 degree wheel cut.
I'm sure someone on the forum more knowledgeable than I will correct this imformation if it's erroneous.
Best Regards, Jim
Jim & SherrySeward
2000 Residency 3790 v10 w/tags 5 Star tune & Banks system Suzuki XL7 toad