If you keep your 2.56 gears, then I think the Continental converter is good advice. According to what I've read, they provide less slip at cruise speed, but "flash" to stall speed when you nail it, better than any other brand out there. So, you should be able to get at least 3000 actual flash stall, but still be OK at cruise speed, with a Continental. The only negative I've read about the Continental converter is it's price. They ain't cheap.
As mentioned, a 2.75 ratio low gear set will also improve launch power. Many of the Stock class racers use this mod. But, that deal ain't cheap either. They're about $500 plus labor to install.
