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77 GMC carb problems

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04-07-2014, 07:33 AM	#5
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: 77 GMC carb problems I had issues with the backflow valve in my 79 carb,it would come out of place and block the flow,kinda like you describe.... http://67-72chevytrucks.com/vboard/s...d.php?t=579621 __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

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