Tiny 1/4" bleeders were/are common on the older stuff. The older shoes simply had a blade that contacted the w/c piston, the later style shoe/wheel cyl. used a "ball & slot" strut
between the shoe & w/c piston. Chrysler redesigned the 10&11" shoes around '76, AFAIK the 9" stayed the same. & No, the bolt spread is wider than a 9" by a bit, so no swappy
w/o some custom "engineering".
