I'm not gonna say who but I just got a message from a person who is claiming that a rear end out of an 86' monte ss is NOT a 7.625 measurement. Their claim is that the 7.625 rear end was only found in the later gen. camaros. Now I may be wrong but I want verification on this because I did my research a long time ago and am pretty sure the monte ss's did not get the regular 7.5 rear.