Several years ago my mother received a phone call from a young woman born between 1972-1976. This woman was living in Yukon and searching for her birth father.
Your mother was from Ontario, perhaps in the Kitchener Waterloo area, could have even been from Cambridge Ontario.
I really don't have much information. Please contact me if this is you. I am his other daughter and would like to connect with you and offer any information I can regarding your parentage.
The picture below is of him around the time of your birth.