Cam swap worth it? '68 383 newport

Engine, Transmission & Driveline

  1. LocuMob

    LocuMob Fluid Technician with a hat FCBO Gold Member

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    Car drives fine with no issues.
     
  2. marty koirtyohann

    marty koirtyohann Member

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    im using a mopar performance b/rb restoration cam its 383/440 Magnum the only one they r currently making is the "3 bolt " cam the specs r 268-284-46* with a valve lift of .450/.458 it has a centerline of 115 degrees the old part # of the cam is P4529270 summit racing lits as
    Mopar Performance Purple Camshaft Kits P4529270AE
    $428.99 u wil need valves springs good for a .500 " lift cam .i have this in my 1972 new yorker it has a 72 440 rebuilt to 1971 specs here r a couple of pics of the car & the motor GEDC0440.JPG jeans motor .jpg
     
  3. marty koirtyohann

    marty koirtyohann Member

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    what dose it weigh? a heavy car should only have a 2000 stall in it . a 2600 will run out ok a stall convertor has to be loaded (brake torqueing it )
     
  4. marty koirtyohann

    marty koirtyohann Member

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    ok

    GEDC0440.JPG

    GEDC0441.JPG

    jean in her towing garb (2).jpg

    jean & her trailer all ready bto go camping! (2).jpg

    118442395_1436023289920028_656178291447515628_n.jpg

    rear seat.jpg

    hitch.jpg

    33399202_10156082600312787_1287656582892486656_o.jpg
     
  5. Newport 66

    Newport 66 Old Man with a Hat FCBO Gold Member

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    Yes I am.
     
  6. marty koirtyohann

    marty koirtyohann Member

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    im running a stock convertor & the replacement valves springs that was used on the 383 magnum,440 magnum & 440 six pack motors . the b/rb/six pack cam needs the stiffer springs for the valve train to work right (I have the old mopar performance racing catalog & the big block racing book (I have the cd its the same was the book)
     
  7. Gerald Morris

    Gerald Morris Senior Member

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    Where does this cam deliver optimal performance? I see you towing a trailer in a pic or 2, and wonder if this cam would be the thing for me. Do you know how much power and torque your 440 produces at given angular velocities? (rpms) I've been exhorted toward "purple sticks" by a couple local enthusiasts, so your cam particularly interests me. I saw on Summit this cam is the "Six Pack" 375 HP cam. If this is so, it makes a good engine, but not really what I want.

    Lovely NYer too, BTW.
     
    Last edited: Jan 13, 2021 at 11:06 PM