Got any BP stations close to you? They sell 92+ octane...and they sell 93 here in Missouri...and I'm pretty sure you should be able to get some high crap in Florida...like 94? Try that coupled with some Autolite 605's...and gap them at .055"...also...you said the car was bone stock right? Go spend $40 at an exhaust shop and have the U-Bend removed...that should kill all of your knock as it sits...also...FYI...easy on the 3-4 shift...your transmission doesn't like 3-4 @ WOT...at ALL.