sb motor mounts on a bb

Small Block Mopar Engine

  1. Flat_Black

    Flat_Black Flat Black king

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    would 318 motor mounts work on 400? i know that the 318 mounts on a truck work on a 400. i used sb motor mounts to put a bb in a 87 d100. has anyone tryed this befor? :scratch: :scratch:
     
  2. Flat_Black

    Flat_Black Flat Black king

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    guess no one has tryed this?????
     
  3. 340mopar

    340mopar Sorgermotorsports

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    I have never tried this so I can't comment on whether it works or not but I can tell you after reviewing part numbers for the brackets for A, B and C bodys none of the brackets share the same part number. But then 273/318 and 340/360 brackets are a little different but can be made to work so anythings possible.
     
  4. Jim Lusk

    Jim Lusk Well-Known Member

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    No.
     
  5. briankaplan

    briankaplan greenduster

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    I thought that spool mounts had the same distance between the
    left and right side. Shouldn't they interchange? Not the upper
    mounts, but the lower frame.
     
  6. 340mopar

    340mopar Sorgermotorsports

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    Yes, the spool mount k-frame is the same for the V8's but the mount that bolts to the block have different part numbers for SB and BB. So if you have a '73 up V8 a-body you can use BB Cordoba block mounts to install a BB in your a-body.
     
  7. jeeper

    jeeper Well-Known Member

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    So you're saying that I can take a b/RB block, get cordoba mounts and bolt it into my 73 with a factory 318?

    No modifying of the K at all?
     
  8. 340mopar

    340mopar Sorgermotorsports

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    According to the MP Chassis Manual yes. The Chassis Manual shows the measurements of both the small block and big block as being the same. I will see if I can scan and post the page that shows this.
     
  9. Jim Lusk

    Jim Lusk Well-Known Member

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    The side to side spacing is the same, BUT the mount saddles are in the wrong fore/aft position to get the big block in the correct location. That's why the mods are necessary to prevent you from having to do other mods.
     
  10. 340mopar

    340mopar Sorgermotorsports

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    Do you know the mods?

    Jim is right I just checked the interchange on a cordoba and the small block and big block use different k-members. Sorry for the mis-info this is what happens when you don't confirm what someone tells you... Thanks Jim for setting it straight.

    Chuck
     
  11. Jim Lusk

    Jim Lusk Well-Known Member

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    Check the tech archives at www.bigblockdart.com. Do not use the measurements published in Chrysler Power magazine from around 1990. Yes, I wrote the article and yes I measured an original DC k-member, which was the source for numbers that were not the best fit.
     
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