998 hp

Hi my name is glenn. I want to put a auto in my r33 gtst this car is the old dragme skyline it had a 2 speed powerglide in it at the moment it has a ppg 5 speed dogbox..the car has over 1000hp has anyone got any imfo on what auto would suit this car for drags and what convertion is involved? looking at 6 cylender 2 speed powerglide or trimatic if anyone can help this would be most appreiated