Here's my WAG with consideration to the K-frame stamping of 272 9 1 (September 29, 1969) first shift that coincides ironically with the same date (not shift) on the fender tag's "Scheduled" Production Date. The guestimate now has to consider the timeline of a '70 model year car from Body-in-White to rolling off of the end of the assembly line. It has two days to do that to get the October date code or screw it and just go with the label being put in place on September 29th, or 30th and move on. No one IMO will call you out on it............well maybe one of those nasty, know it all O.E. judges will or.... laugh2

MikeR