Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9×13 inch pan. Sift together the flour, baking soda and salt. Set aside.
In a large bowl, Beat eggs and 1 1/2 cups white sugar together until smooth. Beat in flour mixture and fruit cocktail with juice. Spread into prepared pan. Mix together the brown sugar and chopped nuts; sprinkle on top of cake.
Bake in the preheated oven for 35 to 40 minutes, or until a toothpick inserted into the center of the cake comes out clean. Remove from oven and immediately poke holes in cake with fork. Pour topping over cake.
To make the topping: In a small saucepan, combine sugar, butter and evaporated milk. Bring to a boil, and stir in coconut.