Mackman87

Fellas, I have a r model single axle dump that I am want to swap the Eaton rear axle out for a mack axle. I just picked up a mack 23k double reduction rear with springs and hangers off a fella to put under the truck. My concern is it is out of an MH cab over and I’m not sure if the rear will work with my truck as it’s an inch wider from hanger to hanger than the r model. Anyone have any experience swapping something like this?