okay, then! ~600 built in 1969 (440) All auto all 8.75 hard parts are the exhaust manifolds esp. left side oil pan/pickup left motor mount bracket and block that will work radiator (I think) wheels?
All this is if going STOCK. obviously, headers, mount and an oil pan isn't going to keep a rodder/racer down!
There were 68-69 383s too. The B block fits better than an RB. More Bs were built too.