Can anyone help in this? My friend have a 67 Camaro with a TH 400 trans. and every one or two months it has the same problem. The starter starts to make a strange noise and ends up broken at the nose. We have tried with shims, starter brace and several different starter including a big block one.The car has have two different engines by now including a 454 (now 350) and the result is the same. When its fixed it works flaulessly for weeks but then the noise reappears. Any help from previous experience will be gladly received.