Bushing and pin material

I have a couple old Fiat loaders that are in need of bushing and pin replacement .Do any of you guys have any advice on what material to use? I have to make them myself due to unavailability of either factory or, aftermarket. I have a full machine shop at my disposal so, that is not a problem. I am thinking brass for the bushings and, stress proof shafting for the pins. Pins are all around 2-1/4 to 2-3/4 dia. range. Not sure what grade of brass to use or, if there is a better alternative....

Bushing and pin material

Bushing and pin material