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  1. ...will not go on one engine. The Vortec heads will require the MFI fuel service. Last but not least you will have to reprogram a PCM to match...

    3 Answers · Cars & Transportation · 15/07/2014

  2. ...year. the PCM from a SFI engine won't run an engine with MFI properly, if not being completely incapable of running it.

    1 Answers · Cars & Transportation · 14/05/2010

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