TKO isn't the greatest for drag racing. Lots of them have problems locking people out of gear at decently high RPMs. There are mods to fix this, but I don't know the details.
With the things they can do with T-5s these days, I'd seriously look into that instead. Much lighter, less horsepower to turn, etc. The G-force and Astro (A-5) T-5s will take as much abuse as a TKO, and shift better too.
I think Quick Time makes a bell for that too.
Steve
