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454 knock - looking for suggestions
Hi guys, in my intro thread I had posted about the 1977 GMC C25 Sierra Classic my dad had given me last fall; 77,000 miles and still on its original engine and transmission. The truck had sat more or less for the past 4 years, and as my buddy and I attempted to revive it this past week we...- Tremek
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- Forum: Engine & Performance
