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  1. J

    New 5.7 300 HP- 1994 Z-71 - need help

    New here, I'm the only owner of my 1994 Z-71 short box regular cab. Bought her off the showroom floor. She's 29-1/2 years old and I wanted to get her some new life for her big 30. I purchased a 300 HP 5.7 long block. Installed it and have had some issues with getting to run smooth. first issue...
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