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  1. J

    160 HP engine for 7GCAA

    I have a 150HP engine in my '78 GCAA, that may need a rebuild and am considering the 160HP O-320-B2B. Got a price from Penn Yan, and they note that I need an STC. Is this a "paper" STC or does some modification really need to be done? I know there's been an article back in 2001(which I'm...
  2. J

    CHT guage installation

    I'm not confident leaning my '78 GCAA and hoping a CHT guage will help. What cylinder is generally the hottest and the likely location for the CHT probe? JP
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