I have a 406 sbc powered nova currently with 3.31 gears in a 12 bolt posi. It makes power up to 5800 rpm and im launching at 3000 rpm off a 2-step.(4 speed muncie, 2.52 first gear) Im currently running 28'' drag radials but will be borrowing some smaller diameter 26'' Hoosier QTPs to test. On a prepped track, i bogg at the line and hit the traps at only 4400 rpm, meaning i still have 1400rpm to get the most out of the powerband. I know i need more gear as my 60' are in the 2.0 second range. My best time has been 12.60 at 110mph and thats spinnin the tires a bit at launch to make up for the gear, followed by a good hook shortly after. The car screams once it gets goin but my 60' is terrible. My question is this: when changing to a numerically higher gear, will my trap speed increase/decrease or stay the same if the car is still in its powerband at the traps. I plugged in the 3.90 and 4.10 gears into a calculator and the 4.10 seem to put me just under 5700 rpm with the same trap speed. If im going to pick up some mph with the gear swap then the 3.90 seem to give me some extra rpm. I dont wanna go too big and run out of rpm is my concern. Which gear is a better choice or what would you suggest? Thanks in advance.