Potter's from michigan,

My grandparents owned the property that the Michigan raceway now sits on, (Michigan 500)I don't know my grandfathers first name, my grandmother is Arvila , Enright was a last name she used, I don't know if that was her maiden, both are dead, my grandfather was a detroit police officer, a WWI vet, and died in the 50's of serocis of the liver, the property used to be an apple orchard to my knowledge, anything would be nice.