1964 Barracuda steering coupler

So I bought a kit to repair my coupler on the end of the steering shaft. When I took apart my existing coupler the seal was shot as was the seal cover. The inside was hard rusty greese but when I cleaned up the end, everything seems fine. I don't see any wear on the two blocks on the end.Do these blocks tend to wear? There is no play with the pin or blocks. Why would I replace the blocks (new ones are not chamfered) outside of the fact that they came in the kit?