1974 Roadrunner K Member small block

1971 - 1974 Mopars

  1. STEPHEN RANSOM

    STEPHEN RANSOM Member

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    My K Member is rusted through on the drivers side near rubber bushing. Where can I find a new one or good used one? Any ideas? I'm new to this car and need help.

    20201107_125001.jpg
     
  2. #41

    #41 Well-Known Member

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    Anyone parting out a 73/74 B body can help? This is a pretty commonly available piece used but is not available new.
     
  3. YY1

    YY1 Well-Known Member

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    @STEPHEN RANSOM

    I believe all are the same up until 1979 Dodge, Plymouth and Chrysler including Cordoba and 4 door cars, but are different small block to big block.

    Be aware, however that cars built without a front sway bar do not have the mount gussets for the bushings.
     
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    • Darter6

      Darter6 FBBO Gold Member FBBO Gold Member

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      Try Wild Cat Auto Wreckers in Oregon. All Mopar yard.Good people to work with.
      Closer to you would be Ted Stephens Performance in Alabama.
       
    • Bb70charger500

      Bb70charger500 FBBO Gold Member FBBO Gold Member

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      I have one sitting here was selling as a complete package for $400 with rotors and all but I could sell just the frame for $200 if your interested let me know probably another $140-150 to ship it to a business address
      Or maybe you know someone in FL right now that will be driving back your way .
      P.m. if your interested
      Also this has a sway bar on it right now !
      From a 73 rallye charger
      KIMG0427.JPG
       
    • STEPHEN RANSOM

      STEPHEN RANSOM Member

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      Other than surface rust is it good solid condition? I would take the sway bar with it just to be safe. Let me know. I'm interested if its nice and solid. Let me know. Also just making sure it's for the small block V8.
       
    • Tim Ziegler

      Tim Ziegler Well-Known Member

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      I don't understand the big block small block k members cuz I pulled a blown 360/727 out of a 76 Cordoba and installed a 400/727 with no problem and never considered the k member being an issue
       
    • YY1

      YY1 Well-Known Member

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      Small block K frame positions the engine about an inch or so forward.

      It may be more pronounced on one side than the other.

      I believe they are also slightly closer together, meaning a BB might sit higher.

      73/74 already has hood clearance issues with a BB.
      Worse on Charger than Plymouth.
       
    • Tim Ziegler

      Tim Ziegler Well-Known Member

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      So the small block k frame would allow a little more room to get at trani-engine bolts... a big block would be longer though... the trani xmember is consistant... I'm just thinking of putting a 440 in an e body or in a 70 b body where there was a 318 without switching k members. hmmm
       
    • QuickBpBp

      QuickBpBp FBBO Gold Member FBBO Gold Member

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      Don't know how that could have happened as the engine literally sits crooked making the transmission angled in the tunnel to where you can't even put the transmission cross member on...
       
    • Tim Ziegler

      Tim Ziegler Well-Known Member

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      I realize the motors sit torward the pass side a bit. Your sayin BP that to bolt the big block into the small block k member the trani would then be to far back for trani crossmember to work... right
       
    • QuickBpBp

      QuickBpBp FBBO Gold Member FBBO Gold Member

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      Not back to far it's angled in the transmission tunnel... I know I tried it decades ago...
       
    • Tim Ziegler

      Tim Ziegler Well-Known Member

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      I'm not the only one on earth thats done the swap cuz now that I think of it... I'VE DONE IT TWICE. 75 Coronet 318, put in a 400 without swapping k member
       
    • Tim Ziegler

      Tim Ziegler Well-Known Member

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      I'd like to put a 440 in a 70 B body with a 318 k member but this time I'll go to Mancini for motor mounts
       
    • YY1

      YY1 Well-Known Member

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      Wonder if you could do the washer/spacer trick like you do on 318/360 swaps.
       
    • QuickBpBp

      QuickBpBp FBBO Gold Member FBBO Gold Member

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      It was not a direct drop in for sure something had to be modified. OTHERWISE Chrysler would have not made another K-member for the BB application..
       
    • QuickBpBp

      QuickBpBp FBBO Gold Member FBBO Gold Member

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      That K-member is the same BB or SB...
       
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      • Tim Ziegler

        Tim Ziegler Well-Known Member

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        The 70 k is the same for BB or SB... My question mark doesn't work
         
      • Tim Ziegler

        Tim Ziegler Well-Known Member

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        You'll have to ask Chrysler why they used 2 k members in later years
         
      • Tim Ziegler

        Tim Ziegler Well-Known Member

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        I wish we'd get a little more input. I hate to think there's so few of us knuckleheads left that have tried this stuff
         
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