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TH350 to TH400 Upgrade

  • Thread starter tim-carroll@comcast.net
  • Start date


I have a 1976 vette with a TH350 automatic - I bought a TH400 and obviously I need to do some modifications. Does anyone know how to go about this - or should I just sell the 400 and buy a rebuilt 350..

I am replacing the tranny because I bought a 435hp Crate Engine

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