I've never heard of the cake before.
I typed in search: salt pork cake, and there are lots there.

I copied this one for you.

INGREDIENTS:
1/2 cup brandy
2 1/2 cups raisins
1 1/2 cups dried currants
1/2 pound finely ground salt pork
1 cup boiling water
1 cup molasses
1/2 cup brown sugar
3 1/2 cups all-purpose flour
1 teaspoon baking powder
1 tablespoon ground allspice
1 tablespoon ground cinnamon
1/2 teaspoon ground nutmeg
1/2 teaspoon ground cloves

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DIRECTIONS:
In a medium saucepan, combine brandy, raisins and currants. Bring to an boil, then remove from heat. Set aside until all liquid is absorbed and mixture is cooled.
Preheat oven to 275 degrees F (135 degrees C). Grease and flour a 10 inch tube pan. Sift together the flour, baking powder, allspice, cinnamon, nutmeg and cloves. Set aside.
In a large bowl, combine the ground salt pork, boiling water, molasses and sugar. Beat well. Add the flour mixture and beat until incorporated. Stir in the raisin mixture. Pour batter into prepared pan.
Bake in the preheated oven for 90 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool 15 minutes in the pan. Remove from pan and cool completely.

Thanks glenda-Your recipe made me smile and think of my Gram-she used to make it in Early december because it needs to soak in brandy for a while-it is just the best "fruit cake" in the world according to my thinking!