There were (not sure if there still are) axles made with BBP and the A body offset (basically what amounted to redrilled A body axles), but these required the drums to be redrilled to the BBP and sometimes the register hole to be bored out.
It was late '99 or 2000.I did my Dart and the neighbors Duster.Yes we re-drilled the drums. The axles had the small register.
It is just a guess that they quit making those because the 1 3/4'' drums were not available new. I had a hard time then even finding a good used one.
