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Re: 2 bbl or 4 bbl??
What is the size of the 4bbl you have? The 4 can be more efficient than the 2 if you keep your foot out of it. Make sure its not too large.
I have a 500cfm with a performer intake, TH350, 3.08 gears and I get 13mpg in town. I dont do the highway much so I dont have a figure for that.
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 Steve
1997 Tahoe LT 4D 2WD (DD)
2001 Blazer 4D 2WD
1961 Apache 10 (sold)
1965 C10 Stepper (sold)
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