I'm currently running the stock 3.90's at about 400hp...I have a set of 4.30's in my garage..By spring I SHOULD crack 500hp and plan on going to the track..should I stick with my gearing or swap in my 4.30's..this isn't my DD so gas mileage and hiway rpm's don't matter...I'm just sketchy about the gears cause I burn through 1st in a flash as it is..