1968-74 Slant 6 head.

Slant 6 Engines

  1. cchrishefish

    cchrishefish Well-Known Member

    Messages:
    625
    Likes Received:
    100
    Joined:
    Oct 22, 2009
    Location:
    Syracuse, NY
    Local Time:
    6:08 AM
    I found a seller on facebook marketplace whom has the more desirable slant head with the improved combustion chamber. What is a fair price for a head that needs to be rebuilt? I want to know what I should offer for it.
     
  2. Hyper_pak

    Hyper_pak Old School Chrysler Fan

    Messages:
    2,406
    Likes Received:
    1280
    Joined:
    Feb 14, 2010
    Location:
    Desoto Texas
    Local Time:
    5:08 AM
    Good question, most of the time people give them away! I would not go more than $50. Odessa Cly Heads has a rebuilt unleaded head for $400 not talking shipping. So if you went 50, you would have 350 left for the machine shop. They usually need guides and half the exhaust valves. If you surface it there is another $75-100 to get a little more compression. Let us know how it turns out!
     
  3. cchrishefish

    cchrishefish Well-Known Member

    Messages:
    625
    Likes Received:
    100
    Joined:
    Oct 22, 2009
    Location:
    Syracuse, NY
    Local Time:
    6:08 AM
    Thank you, he just said he would take $50 for the head and he has a pushbutton 904 which was used in a race car which he will sell to me for a very low price. It is a 4 hour drive into Pennsylvania for me, but how can I resist?
     
  4. Hyper_pak

    Hyper_pak Old School Chrysler Fan

    Messages:
    2,406
    Likes Received:
    1280
    Joined:
    Feb 14, 2010
    Location:
    Desoto Texas
    Local Time:
    5:08 AM
    The trans if used for racing should have a deep pan and a high stall converter. Might have some parts value if he is telling the truth. You can see very easy if it has the deep pan, stock is very shallow. If the pan is there it would be a good indication of some good parts inside. Down side is the early trans doesn't interchange with the changed crank flange around 68.
     
  5. MOPAROFFICIAL

    MOPAROFFICIAL Well-Known Member

    Messages:
    5,021
    Likes Received:
    4000
    Joined:
    Jun 1, 2016
    Location:
    Beach
    Local Time:
    3:08 AM
    You can have a convertor made that has the early guts in a later case. Then they work fine with the 68 n up cranks
     
  6. cchrishefish

    cchrishefish Well-Known Member

    Messages:
    625
    Likes Received:
    100
    Joined:
    Oct 22, 2009
    Location:
    Syracuse, NY
    Local Time:
    6:08 AM
    I am collecting the parts I need to perform the modifications. Since I need to remove the head, top replace the cam, I felt it would be better to find the better combustion style head and have it worked over, maybe some 318 valves etc. Then I can continue driving the car until I have everything. I just purchased a 1964 A body V-8 accelerator pedal assembly. I have a high school friend that races, and I am seeing if he can find me a good machine shop.
     
  7. cchrishefish

    cchrishefish Well-Known Member

    Messages:
    625
    Likes Received:
    100
    Joined:
    Oct 22, 2009
    Location:
    Syracuse, NY
    Local Time:
    6:08 AM
    What pushbutton 904 transmissions will work on my 64 Dart GT slant 6. And, how do I identify different year pushbutton 904's?
     
  8. pishta

    pishta I know I'm right....

    Messages:
    16,502
    Likes Received:
    6188
    Joined:
    Oct 13, 2004
    Location:
    Tustin, CA
    Local Time:
    3:08 AM
    Sure it does. You just need a spacer ring on the smaller converter hub in the larger 68 crank receiver.
     
  9. pishta

    pishta I know I'm right....

    Messages:
    16,502
    Likes Received:
    6188
    Joined:
    Oct 13, 2004
    Location:
    Tustin, CA
    Local Time:
    3:08 AM
    Pushbutton trans were all prior to 65 iirc. 67 and earlier have the 1/4" smaller convertor hub but i think the pushbutton trans had a <66 cable shifter instead of the 66 and newer sector shaft type shifter.
     
  10. Hyper_pak

    Hyper_pak Old School Chrysler Fan

    Messages:
    2,406
    Likes Received:
    1280
    Joined:
    Feb 14, 2010
    Location:
    Desoto Texas
    Local Time:
    5:08 AM
    I meant without some extra parts and knowledge.
     
  11. Charrlie_S

    Charrlie_S Well-Known Member

    Messages:
    2,777
    Likes Received:
    663
    Joined:
    Oct 17, 2005
    Location:
    Silver Springs, FL
    Local Time:
    6:08 AM
    Really need to clarify. All pushbutton 904's will interchange. Not all cable shifted 904's interchange. Pushbutton 904 was from 1960 to 1964. 1965 was a "cable shifted 904, but used a "floor shifter" or columm lever, not the pushbuttons. The transmissions are similar, but the valve bodies are different. The valve bodies can be swapped. There are a few other differences, but they only pertain to when rebuilding. Also slant six, and v-8 transmissions have different cases, so cannot be swapped, but most internal parts can be swapped.
    Just an example: My 66 Cuda had a 1965 904, with a 1964 PB valve body, converted to full manual, with the push button shifter mounted in a console, between the bucket seats. I also did the conversion to a conventional U-joint from the B&T joint.
    Clear as mud?

    I do have one cable shifted 904 that has a longer tail shaft/housing, then any of my others. I have no idea what it is from, other then slant six, and visually looks like a 1965.
     
    Last edited: Feb 23, 2020
  12. cchrishefish

    cchrishefish Well-Known Member

    Messages:
    625
    Likes Received:
    100
    Joined:
    Oct 22, 2009
    Location:
    Syracuse, NY
    Local Time:
    6:08 AM
    Thank you for the helpful information. I have the transmission, head and driveshaft in the back of my truck. The seller surprised me and gave me the intake, exhaust manifold, and 1 barrel carburetor with the head. And, the air cleaner. It was well worth the 4 hour drive. I do not have enough knowledge of trasmissions to know what was done to it. The seller indicated that the owner drag raced slant sixes and passed away. The transmission has a carrying handle attached because he apparently swapped this transmission in and out of different cars. I will have to find someone whom has the knowledge to look it over.
     
  13. cchrishefish

    cchrishefish Well-Known Member

    Messages:
    625
    Likes Received:
    100
    Joined:
    Oct 22, 2009
    Location:
    Syracuse, NY
    Local Time:
    6:08 AM
    Here are some pictures. I will probably sell the intake, exhaust manifold, and carburetor. I do not have a reason to keep them unless I wanted to have the intake converted to accept a larger carburetor. I am still undecided on whether to use a dual Weber intake, or go with a Clifford Hyperpak with Eldelbrock four barrel. And, I am considering a Holley 390 intake system. Which intake system is better for a street performance car? I am not planning on drag racing.

    87335351_487478325495096_3964118144053673984_n.jpg

    87302103_875082242942210_2578872340758659072_n.jpg
     
    Last edited: Feb 23, 2020
  14. Charrlie_S

    Charrlie_S Well-Known Member

    Messages:
    2,777
    Likes Received:
    663
    Joined:
    Oct 17, 2005
    Location:
    Silver Springs, FL
    Local Time:
    6:08 AM
    Hard to tell from the pcture, but it looks like the throttle pressure lever has been cut off. If it has, the trans most likely has a manual valve body.
     
  15. cchrishefish

    cchrishefish Well-Known Member

    Messages:
    625
    Likes Received:
    100
    Joined:
    Oct 22, 2009
    Location:
    Syracuse, NY
    Local Time:
    6:08 AM
    The numbers on the transmission are 2408002P and 0653009. I believe that it is a 1963? And, the numbers indicate Heavy Duty slant 6 transmission. So, was this a good find?
     
    Last edited: Feb 24, 2020
  16. pishta

    pishta I know I'm right....

    Messages:
    16,502
    Likes Received:
    6188
    Joined:
    Oct 13, 2004
    Location:
    Tustin, CA
    Local Time:
    3:08 AM
    Throttle pressure lever is still there. Its a cable operated trans so that (TPL) is the only thing on that shaft. If he raced that trans (looked like he did if he moved it from car to car) its probably got a manual valve body as stated. The hyper pak intake is not great for the street unless you plan on driving it over 3000 RPM and have the cam to match that range, that's where that intake comes on at. Stick with the super six, clifford 6=8 (4bbl) intake or your dual 1bbl setup.
     
    • Thanks! Thanks! x 1
    • Slantsix64

      Slantsix64 Well-Known Member

      Messages:
      2,198
      Likes Received:
      816
      Joined:
      May 11, 2014
      Location:
      SGV
      Local Time:
      5:08 AM
      I run eddy 500 Avs 89 jets up Front and .86 in the rear with a Offy intake carb is pointed at the passenger fender, i get constant 20mpg with 3.55 in a 7.25 city and bit of highway nothing really over 65mph, Dart is pretty quick, since your doing the head add 340 springs and mill that bad boy to boost comp, add the bigger hyper pak valves little port job and you got a little beast! also trim guides if going with a cam over .460 lift
       
      • Thanks! Thanks! x 1
      • cchrishefish

        cchrishefish Well-Known Member

        Messages:
        625
        Likes Received:
        100
        Joined:
        Oct 22, 2009
        Location:
        Syracuse, NY
        Local Time:
        6:08 AM
        What source is out there to purchase 7.25 gear sets?
         
      • cchrishefish

        cchrishefish Well-Known Member

        Messages:
        625
        Likes Received:
        100
        Joined:
        Oct 22, 2009
        Location:
        Syracuse, NY
        Local Time:
        6:08 AM
        Since the serial numbers on this transmission indicate a 1963 car and it is the Heavy Duty model, is this a good find?
         
      • KosmicKuda

        KosmicKuda FABO Gold Member FABO Gold Member

        Messages:
        1,666
        Likes Received:
        486
        Joined:
        Jan 15, 2011
        Location:
        N Ohio
        Local Time:
        6:08 AM
        Street driven car in NY state.
        I'd use a manifold with carb heat or it'll be cold blooded until fully warmed up. I think that's an Offy or get a factory Super Six.
         
      • Slantsix64

        Slantsix64 Well-Known Member

        Messages:
        2,198
        Likes Received:
        816
        Joined:
        May 11, 2014
        Location:
        SGV
        Local Time:
        5:08 AM
        yeah your good but i your motor is 68 and up you need a crank snout adapter
         
      • Slantsix64

        Slantsix64 Well-Known Member

        Messages:
        2,198
        Likes Received:
        816
        Joined:
        May 11, 2014
        Location:
        SGV
        Local Time:
        5:08 AM
        on Ebay motive gears for 7.25 ring gear dodge dakota
         
      • cchrishefish

        cchrishefish Well-Known Member

        Messages:
        625
        Likes Received:
        100
        Joined:
        Oct 22, 2009
        Location:
        Syracuse, NY
        Local Time:
        6:08 AM
        The Clifford intakes with the built in pre heater would not be sufficient during the Summer and Fall? Or the Aussiespeed intake with an optional pre heater would not work, as well?
         
      • cchrishefish

        cchrishefish Well-Known Member

        Messages:
        625
        Likes Received:
        100
        Joined:
        Oct 22, 2009
        Location:
        Syracuse, NY
        Local Time:
        6:08 AM
        How many members whom live in a cold climate use an aftermarket intake manifold with a pre heater? And, do you have any problems?
         
      • Slantsix64

        Slantsix64 Well-Known Member

        Messages:
        2,198
        Likes Received:
        816
        Joined:
        May 11, 2014
        Location:
        SGV
        Local Time:
        5:08 AM
        your going to need heat under that carb, i have clifford headers with four barrel intake with water cooled adapter plate i bought for my offy works great, i have a friend who also runs the same set up with no carb heat gets 15-16 mpg when i get in the 19-20mpg range with heat.
         
      1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
        By continuing to use this site, you are consenting to our use of cookies.