Hughes Cam ( http://www.hughesengines.com/cams/bhydflatlist.asp ) recommended a HE3038BL for a long ram motor I am building for a '60 Plymouth. This one has a 223° @.050", .504" intake and a 230° @.050", .538" exhaust spec. Should you call them, be prepared to answer a lot of questions about your application. Al Wilson -----Original Message----- >I have heard that the addition of a performance cam in a long-ram 300 (such >as my "G") would be more of a detriment to overall performance than a help. > >If this is the case, what of the so-called "short rams" of the later 300's >and would the same problem persist if a HP cam were installed in one of >those vehicles also? > >And finally, were there any 300's ever made with 440's and any sort of >short, long, or cross ram manifolding? > >Karl