others have claimed that it fits. Doesnt fit on my 3B's (later model). The mounts are straight across on this alternator whereas the fixed mount and the adjuster mount are less than 180 apart on the correct 3B alt. It might fit on some non power steering model or if you wanted to modify the adjuster bar (top mount) you could get it to work.
The other consideration is the pulley. This one has a splined shaft for the pulley so you cant interchange the 3B pulley (no splines)
Might fit a 2H directly but id have to compare them