I have to agree with the group, BLACKEDOUT. It took a lot of work and tuning before I was able to run the 3.25" safely.

DuBob has done all of my tuning and my major modifications (cam, headers, exhaust, etc) I strongly suggest looking around for a local club and/or someone with a tuner. The way your car is set up right now, it'd probably run better with the 3.4".