Skep419, is the powervalve the right one? is it opening at in gear idle? that would relly kill mileage. Just for comparison, my 750 DP equipped 340 dart with 727 & 3:91 gears gets at least 10 mpg.
Chris Schwartz
73 Swinger 340 12.451 @ 108.78
73 Gold Duster, needs a plan.