Same here with 3.23 gears 14'' 215 70 R tires, 65 mph at 2.700 rpm all day long... my 390 cfm holley gets an easy 20mpg and on the back roads... HWY 23.. But hay,, It's just a 170/6 :glasses7: And I am tuned correctly Thanks to my fabo / tec's my Offey 4 barrel and split exhaust and only 2,700lbs :smile:I run a solid 32lbs of air all around and getting fresh air to the carb has got to be good for 1 MPG when it's 200 degree's under the hood :thumleft:
Axle bearings and drive line needs to be smoooooth :smile: