Marty The original spec'd cam may not be found by Tuesday morning. The # P4286675 can be. Sometimes this cam also shows up on ebay at a lower cost than what the local dealer may may have it priced at. ( http://search.ebay.com/440-camshaft_W0QQcatrefZC6QQcoactionZcompareQQcoentrypageZsearchQQcopagenumZ1QQfposZQ5AIPQ2fPostalQQfromZR10QQfsooZ1QQfsopZ1QQftrt Z1QQftrvZ1QQsacatZQ2d1QQsadisZ200QQsargnZQ2d1QQsaslcZ2QQsbrftogZ1QQsofocusZunk nown ) Now that you have the original spec's, you can look around to see what is availiable and then talk it over about what you have found. A good rule of the thumb is to keep the duration short and the lift as high for a good pulling street engine. And yes I have heard the 413-426w and first series 440's have differant lifters and push rod sizes than the later ones. Just state this to the counter/ phone person. The ( http://www.1aauto.com/1A/ExhaustManifolds/Dodge/PickupFullSize/PLP1390041/67559 ) exhaust manifolds are a secret horse power gain since they came out in 1972 for our 1959 to 1966 framed cars. I would like to say that I am the first to realize this for our cars, but I'm not. And yes the header down tube needs to be adjusted to fit by the local muffler shop. I have these manifolds with an OEM 1968-1970 HP spec'd set of mufflers under the rear seat area and 1970 Chrysler 300 spec'd resonator's by the gas tank. For the 1963 413 powered car I had them put in a "H" or cross pipe and five years later for the 440 powered 1966 car I asked for an "X". ( I had purchased four mufflers at the same time. ) I have a 1970 27' AirStream to pull so I thought of this as I as ah thinkin. Uncle Rodger & Aunt Gabby Colo Spgs ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm