You’re on the right track thinking it’s a H110, though I’m not sure if that’s the exact model.
It’s not a Dana for sure, which is the only other rear axle offered with disc brakes and 10 lugs on 7.25” bolt circle. If it were a Dana it’s be a 70HD or an 80.
I believe gear ratios are limited to slow and slower, making that model rear not very desirable for our 1 ton trucks. Even if better gears are available it’s 10 lug, like the 1.5 and 2 ton AD trucks, not 8 lug like the 1 ton. Though I did put a 10 lug Dana 70HD version under my 1 ton years ago, had to have single wheels made, none existed from a factory application, only dual wheels.
