It sounds like you will need a synchronized street tranny. I'm more familiar with the drag racing type and not real "up" on road racing trannys. I believe Richmond and G-force produce a transmission that should do the trick. I don't know if either of them make a street box that will handle 750 hp but if you're not running slicks at a drag strip you will probably spin the tires before you apply enough torque to break one of them.