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  1. J

    Optimizer 6500

    I am going to be test driving a 93 K3500 and the owner states that he installed a new mil. spec 6.5 engine from a hummer, purchased on ebay. I've heard good things about the AM General version of the 6.5, and if this one has 10,000 miles on it I think it will suit me just fine. My question is...
  2. J

    6.5 n/a van questions

    Hello, New to the forum, greetings. I'm looking at purchasing a 1995 G30 van with a 6.5 n/a (125,000) and after some research, I had a few questions that I could not find answers for. My ideal engine would have been the 6.2 J series, but beggars can't be choosers and the price/condition is...
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