W900 frame horn and front spring hanger

Does anyone know if there’s a difference between frame horns and the front cast spring hangers on w900 trucks from the 80s? Asking because I’m thinking about upping the front axle to a 20k from a12k. I think I have seen some w9 s where the frame horns are doubled but I can’t recall seeing different from cast hangers other than some are iron and some are aluminum but don’t believe there was any correlation to the weight rating.

 

I don’t know what all you might have access to but is the front spring hanger (casting) considered part of that steering gear or are they talking specifically about the steering box and associated moving parts?

 

That’s only the back mount though correct?
The one at the very front of the truck on the horn never carries a box on a w9 to my knowledge… please correct me if I’m wrong