as far as I know there are no strectched Rockets on the planet as of yet. And only a few have done different swing frames.
Carpenter Racing has based their bikes around high horse power and streetability. They do not even use a wheelie bar as of yet. as for LSR only a few Rockets have run the race with Hombre pulling the fastest time at maxton. He made 175 mph and has not had his running long enough to go anyfurther yet.