Thinking back, my old engine did roughly the same thing. No idea how many miles were on it, old old rebuild. But it would knock when coasting, hard on the throttle it sounded and pulled great. Thrust bearing was very worn out, center main was missing large chunks and the rod bearings were all flaking apart. Hard to say what was actually making noise, probably everything
I hope the bronze thrust replacement works out for you. Have you contacted the rebuilder again?