ONE THING YOU NEED TO CONSIDER ALSO IS HOW MUCH POWER DO YOU WANT TO MAKE?IVE HEARD AT 800 PLUS HP YOU SHOULD REALLY BE LOOKING AT AN AFTERMARKET TRANS(CASE AND GUTS)WHICH WILL PROBABLY OVER TAKE THE PRICE ON TH400 WITH GOOD GUTS AND I AM OF THE OPINION THAT WITH MORE GEARS IN THE TRANNY WILL POTENTIALLY BE QUICKER UNDER MOST CERCUMSTANCES AND ESPECIALLY IF CAR IS OVER ABOUT 3200 LBS.
MY VOTE IF YOU DONT OVER TORQUE MULTIPY THE REAR TIRES- GOES TO THE TH400