You are confusing the part number which has an E on the end with the date code that is cast near it. In this case the date code sought starts with a C or a D meaning April or March 1971. In the case od Bruno's post he left off the E on the part number and indicated he had a D-17 date coded 70 intake --which means April 17, 1971.
Check this one on ebay: http://cgi.ebay.com/ebaymotors/ws/e...=4637769297&rd=1&sspagename=STRK:MEWA:IT&rd=1
The one one ebay is a September 25. 1969 date code and he says he is looking for a March or April 1970 date code.