With stage 7 needles you will need smaller mains. Stock needles I ran a shim and 170 mains, 177.5 PAJ2. Ran pretty good 35-40 mpg.
Stage 7 needles I'm at 155 mains, 3rd notch on needles, 170 PAJ2. I think I might be able to go to 152.5 mains. 750 ft elevation.
Dale