I will see what I can do but need your father's first name.
There was an Evelyn Lakin who was born in 1916 in Colorado and died in 1977 in Fullerton, Orange County, California.Is this your grandmother?If you think it might be you can get a copy of her death certificate - perhaps she was living with your dad at the time of her death?
I am not related (as far as I know) - my Lakin connection is to Thomas Lakin who married Priscilla Sullivan in about 1785 and had a daughter Anna in 1792 who married Moses Wright - Anna and Moses are my ggg-grandparents.
I will look through the paperwork I have and see what I can find, but if you have you father's first name and are willing to share with me that would help in the search.Most of the records online end in about 1930 and he would have been born about 1940-45 (I'm guessing).
Let me know if I can help - Good luck with your search