I reckon about equivalent of 14mpg.. 350SBC, TH400 and I think that's a stock rear end I'm running.
Bizzare thing is I get that ALL the time, towing 75mph everything!! is pretty weird....it only fluctuates by about 1MPG kinda weird I think...
but there ya go....
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..give it a turn here, take some wedge out there, we'll win some races...
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