OK, I will do some searching first before post a question on this site. Yea, that info did come from the previous owner but he seames pretty credible to me. He told me he used to be a Z-car judge and that Datsun did make the 5-spd but only as a special order option and only in 1973. It has a small round flange on the driveshaft end. This is not my first Z car but it is my first 240Z. Thanks for all of your thoughts & input.