The 318 was a great, dependable engine - but definitely not for an Imperial. According to Petersens's Complete Book of Chry.Ply. & Dodge - 1966 had 2 440's - 350hp @ 4400rpm & 360hp @ 4600rpm. I hope that listing was just a mistake. JIm Brown '62Custom '63LeBaron __________________________________ Do you Yahoo!? Yahoo! Search - Find what you’re looking for faster http://search.yahoo.com