$476 to assemble an 8 3/4 diff

One thing I've found being a mechanic is people expect you to do them favors...lifelong friends will tell me things that other guys say and I say "who are you going to believe them, or the guy who worked the business for 25 years...?" Everyone wants to tear down and rebuild, I say check it and see if it needs it. I know a guy with more money than brains has a 68 Chevy 327, hes going to let some guy rebuild it. i am like "why, it runs doesnt it?" Id bet 5 to 1 he doesn't get it back( camelback heads) hell get some 305 from the mid 70s/early 80s ..OR it will be screwed up in some fashion..