These photos (how many of photos there are at all from that period in Afghanistan?) show that Afghan women were able to wear highly revealing clothing in public, like were Iranian women at the time. Something that this day is extremely unlikely in Afghanistan and Iran.

Different histories, same outcome - the point being - we really do not know what would have happened in Iran.

If you didn't know then Iranian revolution did not start as Islamic revolution. It started as popular revolution against shah but the other revolutionaries were eliminated by the Islamists.