That is my guess too, Freddie. Cant see too many of these around with a 67 date that look like they were just cast unless they came together as a set. Thanks for your input. the pinion actually says 67 8 then part number unless the 8 is a component of the part number as there is a dash after it. I didnt think so because there is a good deal of space between the 8 and the dash immediatedly followed by 3853008? like thisbig gear head said:I sold a set of NOS 3.31 gears about a year ago for $275. I probably could have got more for them. Are you sure that they are dated a month apart? Could you be reading the number wrong? I guess one could have been cut on the last day of Aug. and the other on the first day of Sep.
67 8________-3853008-11-39-GM- What do you think? Jason.
the underline only represent space not broaching as the forums dont support spaces greater than 2