Motor mounts. 360 going where a 318 was. M Mounts the same?

Small Block Mopar Engine

  1. Dust me once

    Dust me once Member

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    Stuffing a 1978 ish 360 where a 318 was in my 1970 duster. Are motor mounts the same? I did a brief search on site here but did not come up with anything. Thanks in advance.
     
  2. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

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    driver sides are different..
     
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    • pishta

      pishta I know I'm right....

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      driver side is like 1/4 wider. You can make up the difference on the one side in washers.
       
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      • TrailBeast

        TrailBeast Slightly Twisted Member

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        Pishta hit it on the nose, so yes, you can use the 318 mount if you wish
        This is one that someone spaced with a too small piece, but you get the idea.
        The washers is what I used and I believe it's more sturdy than this little spacer.

        View attachment 1715214704

        mount.jpg
         
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        • 67Dart273

          67Dart273 Well-Known Member

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          I STILL REMEMBER in the '70's when I stuck a 340 into my 70 Roadrunner, using 318 brackets, "wondering why" the driver side would need washers........

          _mg_6209cs-jpg.jpg

          81sruds.jpg
           
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          • Cope

            Cope Fusing with fire

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            When I had the engine on the stand I just cut the mount and rewelded it.
             
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