Bolt stud part numbers for 455 water pumps: 5/16 - 18 x 1.5" Bolt stud - P/N 404352 (Upper, All)
3/8 - 16 x 15/16" Bolt stud - P/N 398444 (Lower, Cutlass and 442) 3/8 - 16 x 1 and 1/8" Bolt stud - P/N 398446 (Lower, Toro only) Bolt stud for 455 cylinder heads: 7/16 - 14 x 4.17" - P/N 383038 (All - usage depends on options) Bolt stud for 455 intake manifolds: 3/8 - 16 x 2" - P/N 406165 (All - usage depends on options) Hope this helps. I have all the part numbers for engine fasteners. Paul Tumolo - Principal and Founder Edusult Performance Systems 6 Clark Street Medway, MA 02053-2204 Office: 508-482-0184 Mobile: 508-789-8191 www.edusult.com "Leadership and learning are indispensable to each other" - John F. Kennedy "We are what we repeatedly do. Excellence is not an act, but a habit" - Aristotle
