Diesel Bombers - 12 valve into 77 GMC Sierra

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77gmc

12-19-2013 09:34 PM

12 valve into 77 GMC Sierra

considering swapping my 350 in my 77 GMC Sierra for a 12 valve Cummins. what all would i need to change/beef up? help would be appreciated

RedChevy44

12-19-2013 10:26 PM

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