Quote: 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.
The vacuum jumps from around 3-5 at idle. But I watched the holley video and they said to have the car in gear while you read the gauge. So the 4.5 I'm running could be wrong.
