Is there a book i can get to show how to wire a 1968 camaro from coupe to rs clone????

really nothing much is wired up differently since headlights are (supposed to be) vacuum operated. standard wiring diagram may help out any minor issues you may have

Search the forums on "indentify RS" or something close to that. I remember reading and posting just about everything (if not more) you'll ever need to complete your clone.