[adamjwilson]

The LT1 engine LOVE E fuel... I normally run a blend 50% E85 and 50% 93 octane. You will see a HP boost running E for sure. King or CP can correct me if I am wrong here, but I think it is like a 25-45 HP gain over 93. MPG will suffer but the HP gains..
The easiest mods are a cold air intake, E85 kit, maybe aftermarket exhaust (Corsa or Borla), and a tune. You will need a tune after installing the E85 kit. Normally tuning your ECM will void your powertrain warranty, so if this is a concern, ask you local dealer to be sure. I have seen it both ways here. I voided my powertrain warranty long time ago with about 200 miles on the car...lol.