[bruceman1968]

Yes, round numbers are cool, very cool. I have been checking numbers for you once a week. I haven't found anything that helps yet. But I did find a (0S) door sticker that was after 157xxx. 0S167532 5/70, No help, but sooner or later one of us will hit a number between 1389xx and 155xxx that will help. You have done a great job narrowing it down using your dash pad, gauge cluster, and transfer case. Have you checked the code on your rear axle. If original, it will have the month and day on it. Not definitive but it will add some info.