Approx 350hp 5.7liter engine. Do I need 65, 69, 75, 85, or 90? I will be running stock fuel pressure(11-13psi), 454 or Holley 670 TBI unit. I need to feed the engine up to 6000rpm, possible 150 shot of NOS later too. With so many to choose from, I'm at a loss as to which will be right for my car. Don't wanna run lean or rich so if you have a similar set up, let me know, thanks!