They were "similar" but with enough changes that if it's not listed for your year I would not try it unless I could see an accurate picture first just to make sure it utilizes the same type of connector (which changed at least once over the years) and other stuff.
If the strain-relief/connector thingy that attaches to the back of the alternator is slightly different, that can probably still mount to the alternator. But they changed those at least twice over the years as well, so it's worth noting at least.
Are the older ones even still available still? I thought they had been discontinued, but maybe that was the ignition harnesses.
Paul