Hi. The value of your 275 GTB/4 can vary from 1 million to over 2 million depending on body style and condition. http://www.hagerty.com/price-guide/1967-Ferrari-275_GTB!4
Please click on the link above as Hagerty is the leader in classic and exoctic car insurance. Thanks, Eric
Oh. Sorry I misunderstood.
I am not sure I can give you a 100% accurate answer.
I have found another link that deals with new and used Ferrari manuals.
Maybe this link can get you closer to the correct information you need. Let me know if it helps at all. Thanks.
Is this what your parts manual looks like? Click the Link