I used to run 48 pitch on my pro 4 with 69T spur and 41t pinion (team atlas make this pinion i think they also make a 42T) in my Pro 4. I think they fit in the cyclone but im not sure
Im not that keen on pulling it apart.
I havent seen any people running that high a rollout with 64 pitch though.
PS. For 540 stiffen the car up put in the one way and reduce the rear toe to as low as possible for the grip you need.... 540 is about maintaining corner speed.