did a mileage check on my V8 after changing the rear to a 3.46 Info! with the 3.07 at 60 i was turning 2000 rpm,,,with the 3.46 2300 rpm
now the 3.46 is in the car so,,,,,at 60 mph 2300 rpm 275-35 19 tires i got 21.7 mpg on a 200 mile trip,
on the return trim i ran 75 , rpm was 2600, bursting up to 80 to 90 three or 4 times I got 17.9 return trip 190 miles, ,, to my daughter's and the the gas station must be 10 miles,, jim