Installing a TV wall mount. The issue is that the wall is 1/2" dry over 1x2 wood spaced 24 inch on center and then concrete block. What is the best fastner to to use considering the first 1 1/4" would not hold a TV mount for a 70 lb TV. Would like to secure into the concrete block. Most of the sleeve anchors I have seen online looked like they would rely more on the wood than concrete since they are only 2.25 inches long..
Any advise would be greatly appreciated.