Denny, my '67 250 4.57 with Rotchester B is a little better at 10 mpg city driving. Getting the carpy gas mileage of a 60's/70's musclecar with none of the fun!

Joe
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'67 Chevy C20 fleetside, 250 inline, 3 on tree, heavy duty clutch and brakes, heater, steel bed floor
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"Tighten until the stud snaps, then back off half a turn."