I`m removing a non-functional 6FT. aluminum sliding door and replacing it with a 3ft. steel entry door. When we removed the old 6ft. door we found that the cement blocks (existing) were all loose,cracked & or broke. and the wood was also rotting. My plan is to make a 2″x 8′ step wall out of treated lumber and fasten it to the existing solid blocks with the Tapcons. I`m not sure if it is ok to do this that way. Or if I have to put bolts or rods in with cement the core of the block.