74 duster codes

hi i just bought this 74 duster. a have a b body and a c body so i needed a a body!!! my wife didnt think so but she doesnt know anything! interesting car. it has the twin racing mirrors on it. top line of vin tag has L2 and 867. no en1 or en2 on tag. cant find what these numbers mean. please help me. a proud a body owner thank you