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#1
10-18-2009, 09:57 AM
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77 seirra carb
I have rebuilt a 2 barrel carb on a friends '77 GMC pickup. It has been a long time since I have worked on a carb. I really enjoyed it. However, I can't remember the number of turns on the needle jets. Is it 1½ revolution or is that for Fords? Like I said it has been a long time.
Thanks, Steve 
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#2
10-18-2009, 04:08 PM
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Re: 77 seirra carb
Bottom, gently, the idle srews, back out 1.5 turns, get a vacuum gage on it and final adjust to the best vacuum readings, every engine is different.
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