Starting line ratio too steep?

[casrak7]

Have a 2990 lb raced weight car on a 28x10.5. I want to run the car 1/8 mile. It's a 360 cube small Chevy. It makes 621 hp at 7300. It makes 483 ft lbs at 6000. It has an A1 6300 converter and a well built th350 currently. Right now it has a 4.30 gear and is not optimal for either the quarter or eighth. But I want to cross the eighth around 8000 rpm in high. I can buy a 5.71 gear which should put me right about there, assuming 5 percent converter slippage or so. The starting line ratio will be steep with the 3 speed auto. (2.52 first). Is this doable in your experience? Starting line ratio will be 14.39.......