I don't know what you mean "top and bottom end cases" but I have a couple of undamaged sets of cases, plus cylinders and heads that go with them. One I got already torn down to pieces. The other came to me needing a topend. I took the topend off, it was worn but still would clean up at 67-67.25mm. I never split the cases, though the side to side play on the rod is excessive.