I had a lot of Weaver stuff over the years and followed their line as much as I could. I don't ever remember them doing an Archbar truck. I don't ever remember seeing anything other than a bettendorf style truck.
I can't think of a weaver car that an ARchbar would have been used on commonly.
Athearn made/makes Bettendorf, Andrews, and Archbar trucks. Currenly I think they are all made with Delrin style engineeing plastic with metal axles. They mount at the same height with the same size screws as WEaver at least for 2 rail. Prior to Delrin, Athearn made diecast trucks, but that is way back. You would only find them at shows now in old collections.
Intermountain metal wheelsets are a drop in fit and create a fairly heavy truck. In my opinion this is a much better truck than all diecast. All the diecast trucks I have dealt with, older issues, have not rolled nearly as freely as delrin trucks.
