[Bill Bess]

The other Ed, It depends on how you intend on driving the car and what you desire as far as acceleration, throttle response, noise at highspeeds and fuel mileage etc.

Lower gear ratios will give you the quickness off the line and good for drag racing and quick response out of turns.
If you want to cruise the highways at 80 mph, with low exhaust noise, low rpms'..go with 325, 300, 308 something like that.

Bill