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gas to diesel swap

  1. 6.5L Diesel Engine
    Hey y’all! I just had a 1999 GMC 1 ton single cab, with a 454 gasser, and a 4L80 transmission given to me. I shortly found out that the motor was locked up from rust, from inspection I think the head gasket is bad. However I was wondering what Diesel motor would be the best to swap with the 454...
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