I could see the 9" killing a tenth or so with the weight and efficiency, but that's a drastic loss.
It lost some 60' also. Went fron 1.55 to 1.63. Don't have jet extensions yet, but I'll add them soon. Felt like it was breaking traction a little, trying to hop on the line.
It was trapping right at 6500 with the 9"
Engine was pulling to 7K easy in 1st & 2nd with the 3.73's. Now it don't seem to pull. I'm hoping the engine is reving faster and taxing the fuel setup. The new lines will tell.