Im at 600-700 above sea level and I have a 397 4 Mil stock cylinder with Sb shearers 35 pwks, vf3, redline porting, pump gas and my Jetting is at 145 main, 48 pilots, CELs on the 5th groove with air screws 2 turns out and my jetting is about perfect on days that its not over 80 degrees.