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Old 05-13-2014, 11:39 PM   #15
Cercious
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Join Date: Apr 2014
Location: Rowlett, Texas
Posts: 20
Re: rear end swap for different gear ratio

Quote:
Originally Posted by scrapmetalart View Post
what kind of gas mileage do you experience?
Been keeping an eye on this thread since I'm wanting posi in my '71. I have a 350 with a 750 CFM Quadrajet carb, 3 speed on the column, and 3.08 final. While I was in the Army, on post I got around 8 to 12 MPG. I have a bit of a problem taking my time getting to the speed limit. On the highway when I was on leave going home and back, I was surprised to find I was averaging 25 MPG. I don't have a tach, so I can't tell you how wound up it was, but my average speed between home and post was around 75 MPH.

Hope this helps,

-Patrick
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