The CO27 is onroad (probably won more stock class races than all of the other 27T motors put together)...you may be thinking of the P2K2. The internal ratio on the FK's is 1.77, which still puts FDR with a 93/27 at 6.10. A 116/46 would get me in the ballpark but I don't know if it will fit, and I don't want to order a bunch of gears that I won't need as I have a pit box full of them already.
-rocky b