I did read that. Cool story from back in the day... But. I don't think that is what is going on here.
Unlikely 69 parts would even be on a 68 production line. His car would need to have a extremely late sequential number for it to even be likely, even then I don't see it being done.
My money would be on 1 of 2 things.
Stolen car (at one time over the last 40 years) fender tag was removed and the dash/vin was swapped from a titled, junked car.
or
Someone really liked the trim on a 69 better than a 68 so he changed things over.