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  1. J

    1991 OMC 4.3L HO SPITFIRE TO EST CONVERSION. NEED HELP.

    Thanks for getting back to me in such short time, I appreciate that. So if I understand correctly, trying to convert from the spitfire to a EST will not be possible inorder to achieve proper shift interruption operation?
  2. J

    1991 OMC 4.3L HO SPITFIRE TO EST CONVERSION. NEED HELP.

    I have a 1991 donzi sweet 16' with a omc 4.3L H/O 4v engine. The spitfire system I've been told is starting to crap out.. Instead of wasting time messing with the obsolete spitfire system I have purchased a GM EST ignition convertion kit from Sierra P/N- 18-8835-1. My question(s) are as follows...
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