yea, good luck with that. I have a small pile (probable 10-15 left) of Mopar driveshafts that have been out of vehicles for years, but have been stored inside. The problem is, they were under the cars they were in for years before I ever saw them. You wouldn't be able to see a stamped number on any of them. too much dirt and rust, and cleaning them off would remove the numbers. I've never see a listing based on the length, something like that would have been really helpful through the years. Gene