Unless you get a NOS dampener, I would not bother with a used one, unless it's handy. Dale manufacturing started off rebuilding Corvair dampeners and flywheels, and has gone to rebuilding any dampener, with a guarantee, probably better than stock. I followed the Corvair scene with about 6 Corvairs before I got broke loose by divorce, and Dale's was the rebuilder of choice. Never needed one, had enough spares, but even new ones didn't have as good a guarantee as Dale's. I should tell you that Corvairs tended to loosen up their riveted 3-piece flywheel, which knocked the heck out of the dampener, so they did come apart frequently, but Dale's uses a molded compound, urethane, I think, didn't check, so it beats the rubber normally used in factory stuff. Here's the link: http://www.dalemfg.com/daley_001.htm Glenn Ford Warburg, Alberta 87 all the way, Eagle wag auto, Eagle wag Ltd T5, Wagoneer Ltd auto 4.0, Plus 85 Wagoneer Ltd auto V-6