Preheat the oven to 350 degrees F. Grease the edges of two 9-inch round cake pans. Dust with flour and tap out the excess. Line the bottom of each pan with a circle of parchment paper.
While the cakes are cooling, in a medium saucepan combine the cream, sugar, and egg yolks. Put the butter, salt, toasted coconut and pecan pieces in a large bowl; set aside. Heat the cream mixture and cook, stirring constantly until the mixture begins to thicken and coat the back of the spoon (about 170-175 degrees F on an instant read thermometer). Pour the hot custard into the pecan-coconut mixture and stir until the butter is melted. Cool completely to room temperature. It will thicken as it cools.
To make the syrup:
In a small saucepan, heat the sugar and water until the sugar has dissolved, stirring occasionally. Remove from heat and stir in the dark rum.
Place the chopped chocolate in a bowl with the corn syrup and butter. Heat the cream in a small saucepan over medium heat until it just begins to boil. Remove from heat and pour over the chocolate. Let stand one minute, then stir until smooth. Chill thoroughly in the refrigerator until firm enough for icing the cake.
Using a serrated bread knife cut both cake layers in half horizontally. Set the first layer on a cake plate. Brush well with syrup then spread 3/4 cup of the coconut filling over the cake layer. Set another cake layer on top. Repeat, brushing each layer with the syrup and then spreading 3/4 cup of the coconut filling over each layer, including the top. Ice the sides of the cake with the chocolate icing and pipe a decorative border around the top.
*Nutritional information is an estimate. Please consult a doctor or nutritionist for the most accurate nutritional info.