I looked at getting a standard one, but they are only 5 speed and Not sure where the shifter ends up. The sequential idea was great. 6 speed, holds the power, and sequential.
Maybe R35 rear mount transmission? That would be intriguing.
R35 Transmission - eBay
Stock Gas tank would need to be removed, and a custom standalone controller as well.
AWD Turbo v8:
[ame="http://youtu.be/bX8ktTYswA0"]http://youtu.be/bX8ktTYswA0[/ame]