Re: SO who came up with the GMC V6's???
I talked with Don Meyer a few times over the years, he is is very knowledgeable about GMC in the old days.
As for the low compression, there are a couple of factors. First, large bore engines can be more prone to knocking, all other things being equal. Also, gasoline truck engines of the era were designed to use low octane (cheap!) fuel. None of the GMC V-6's contemporaries had very high compression, most were in the 7:1 to 8:1 range. These engines were designed to be abused!
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