Which Flexplate?

Discussion in 'Small Block Mopar Engine' started by gzig5, Oct 9, 2018.

  1. gzig5

    gzig5 FABO Gold Member FABO Gold Member

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    While the trans was out to be rebuilt I found that my flexplate is bent and needs to be replaced. Internally balanced '71 340 with a 727 TF. I'm going to build the engine next year so may as well get a stronger one. The B&M 10230 looks good but seems some folks have had interference issues with the starter? Recommendations or anything to stay away from?
     
  2. MoparMike1974

    MoparMike1974 Well-Known Member

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    The B&M's are very good flex plates. I cracked several stock ones. Switched to the B&M and have been using them ever since with no problems. Never heard of anyone having starter interference problems with them. No sure why you would, I believe the OD is the same as stock.
     
    • Agree Agree x 3
    • mderoy340

      mderoy340 Well-Known Member

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      727 no issues with your flex plate, 904 is where you may run into issues.
       
    • Hellrats

      Hellrats Still wrenching after all these years FABO Gold Member

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      I have been using B&M flex plates for years in both 727 and 904. Never any problem with either one.
       
    • Wyrmrider

      Wyrmrider Well-Known Member

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      have you tried the hacksaw through the trailing side of the big holes mod
       
    • gregpurcell

      gregpurcell Greg Purcell

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      B&M flexplates are great for externally balanced engines with torque converter weight issues. On internally balanced steel crank motors, there are only two stock flexplates if you want to go factory. You will have either the 10 inch or the 11 inch. measure your converter and use the correct one. The bolt pattern is the same on big or small block engines and the 4 outside holes are the same on 904 or 727.
      flexplatediff.jpg
       
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