Plans are to install a wood mantle over the current 73" brick one. As you can see, the bricks step down in depth size: 7.75 > 6.25 > 5.75 > 5 > 4.25 (total of 10.25 in height), then solid brick face another 39.5 down to the 15.5 deep hearth. Thoughts are to cover the top & add moulding only over...