From a closed Buick dealer, Buick part #1363016 fits 1964, 1965, 1966 Wildcat with 401 or 425 and manual transmission. $300 plus shipping. Can deliver to Englishtown tomorrow, Friday 9/25, or to Hershey 10/6 thru 10/10. John
Gary, this is the one thats recessed for the clutch pressure plate- for the Skylark GS Nailhead the flywheel has no recessed area- I have an old one may be burnt up though. I bought a new billet one from Carmen for my 65 GS