I am wanting to put some gears in the car. The stock gears are way too long in 3/4/5th gears. All my power is in the top of the power band 4.5l-7k so I am wondering about this gear stuff. I have another vehicle to drive but I prefer to drive the GTO to work on my 60mile round trip commute. I spend 90% of my trip in 6th gear cruising along at about 2k rpm. This equates to about 80ish mph. I normally drive at 70-80mph so how short can I make the gears and still be in the 200-2500rpm range while cruising along on the highway? I am also wondering how much of a difference the gears make at the track when 1/4mi et's and mph is concerned. I see that 4.11 gears seem to be too short as what I've found in searching. 3.73's will get the job done but I'm wondering if the 3.91's might be a good comprimise. Please all input is appreciated.