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Posted by Russ Roth [24.21.77.67] on Saturday, January 08, 2011 at 13:16:56 :
In Reply to: 4:10 VS 3:73 VS 3:54 Gears posted by Frank [207.119.8.3] on Saturday, January 08, 2011 at 10:02:24 :
I owned a '73 W200 for years equipped much like yours except it was a 4 speed and had a 340/4 bbl intake on it. I also bumped the timing up about 5* over stock. The only time my mileage was that low was when I was towing a good load. I was able to get 13 MPG or a little better on the freeway but I had to keep at right at 55. In town averaged about 10. I wouldn't think you would gain enough (if any) to make a gear swap worthwhile. JMHO.
RR