the block is just extra metal. it doesn't need to be square. it just need the right size bolt hole. everything around the bolt hole is just excess metal. in the pics from therangerstation the hole and the inside looks the same, just has less metal around the outside on the ruber one.
but i heard you were getting some help with the brakes? and i didn't know you needed shocks. i have some bilstiens for a 5" lift in the garage. but i think you said you found some that fit right.