Pumpkin Pie Cake

Pumpkin Pie Cake 
4 eggs, lightly beaten, 
29 oz pumpkin, 
1 and 1/2 c. sugar, 
1 t. salt, 
3/4 t. ginger, 
1/2 t cloves, 
2 t. cinnamon, 
1 can evap. milk, 
1 cake mix (spice or yellow), 
2 sticks butter. 
Mix, except cake mix and butter. 
Pour mixture into 9 x 13 pan. 
Sprinkle cake mix on top. 
top with thin slices of butter all over the cake mix. 
Bake 325 degrees for about 1 hour 15 minutes.