You mean ratio wise? Aside from full racing, which is king (although I haven't hit 400 mph yet lat alone 1000) the Viper GTS/Competition Coupe gearbox has the least gear. (tallest)
With the Calibra/Spoon Civic/F1 engines, 1st gear alone is capable of over 100 mph. In a 1000hp z/28 with Calibra motor I never had to shift beyond 4th...