86formula

iTrader: (3)

im preping for a future large turbo or nitrous build and going with a TH400 the first time around, the car has 4.30 gears in the 12bolt because its a 6spd currently on 27" tires. is this going to be a problem when i switch to the TH400? top speed in 3rd should be 121 not taking into account converter slip or the tires growing on the big end. once the motor is built i should be able to spin to 7k and a 27" tire should take me to 126 but again this isnt taking converter slip into play. ill be using a spragless Vig converter. anyone with some insight? i can always go to a 28 as well

382ssz28

iTrader: (24)

If you are going large turbo, you will end up with 3.00-3.42 gears as the motor needs to be loaded with a spec built converter with 28" tires. Go to the Forced Induction Section. They can help.