We used a 2.28 in the GTX and it worked well. However, BIg cubes, n20 and 16 x33 tires. Car ran 7.30s at over 190. Short times were off the chain. Car only ran a 3.90 gear. I think it actually calmed the car down and we even considered a 2.08 gear that Rick Allison was working on. Not sure if he ever did that or not. Very specific combination and GREAT chassis.
Todd