FMX rebuild

I recently mounted a FMX into my car. The car wont drive forwards, only backwards. i have figured out that the clutches has to be burned.. BUT, i can't find a rebuild kit for FMX, only for the c-4, c-6, c-5..... does the c-6 stuff fit the FMX or what??

Took me 30 seconds....
http://www.drivetrain.com/autotransoverhaulkits.html

THANKS!!

BTW, what is the difference in these trannies? the c6 vs. FMX? is the components inside different or is the only thing that differs the "1000 LBS" iron Casting in the middle of the FMX's body?