I have an 88GT making about 600rwhp.The car is set up for top end racing.I am looking to get a new tranny and have narrowed my choices to a G-Force T-5 or a T-56.I am currently running 3.73 gears.The T-5 is available with a .59 ratio 5th gear and the T-56 has .63 or .50 for the viper spec in 6th.Which tranny will give me more top end