Diesel Bombers - 12 valve into 77 GMC Sierra

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77gmc

12-20-2013 07:37 AM

12 valve into 77 GMC Sierra

I'm considering a 12 valve cummins into my 77 GMC Sierra. what all would i need to convert/beef up? it currently has a 350 in it with a turbo 400 trans its 4x4 and 3/4 ton axles. any help would be appreciated thanks

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