I need to hang the large TV board onto my wall. The wall is 1/2" drywall mounted onto 3/4" thick wood furring strips which are mounted onto cement block. The TV board has 3 wood blocks that are to be mounted onto the drywall and will marry with the three blocks mounted to the rear of the TV board. None of the blocks line up with the wood furring strips. I feel I need to add additional anchors besides the 3 wood blocks with a TV board this heavy. What are my options to mount this large board with confidence? Thank you.