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would it be unreasonable to hope for20mpg with a stock 350 with a 700r trans. and355 gears in a 92 s-10 if I can keep my foot out of it?
 

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TBI Fuel injected....probably on the highway, 16-18 around town.
MPI would get better.

Carbed....maybe (downhill) 14-18 around town


Other factors include age of motor, diameter of tires, winter/summer, condition of transmission/torque converter.
 

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if i calculated correctly i got approxiamately 16-18 today on a trip with a 305,600 holley,th350,3:73 gears,205/60/15 tires,not sure how fast i was going b.c my speedo doesnt work,i was turning anywhere from 2400-2900,mainly just a straight road with a few stops here and there
 

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Yea, I have a 355ci/350 with TH400 and 4.11's in mine and I average around 14mpg-19mpg. That's stomping on it every now and then/Freeway. About 14-17 on city streets. I'm looking for a turbo and will upgrade my fuel stuff and hope for a mild 20mpg as it can be done.
 
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