I think G-force I think??????? might have an upgrade kit for it.
I was talking to a guy last week at the track that had a 347 stroker with a Novi 2000 supercharger. His car was a 5 speed and man, his car didnt look like it was any fun to drive down the track. It jerked violently to the right everytime he would shift.
With that much HP you might want to look at a Richmond 6 speed or a Dodge viper tranny. I have seen a couple stangs with a dodge viper tranny, I bet it is expensive as hell though.
Good luck and I want a ride
