Stop in for a cup of coffee
You could order a 440 in a 1/2 ton truck in the late 70’s. Know a guy locally that had one with a 9.25 rear end. I owned a non-running 1978 that was a factory 440 truck. Had a Dana 44 front and an 8.25” rear-not sure if that was original or not. Regardless, I ran a 9.25 in my old mud truck with 39.5 Super Swampers on it and never had a problem. They’re a pretty stout axle.