Question about silber turbo on a shorttrack?

Hello, last year i built a 09 Iqr sled with a 2013 pro cfi 800 engine in it, ran great and love the sled, i recently found a great deal on a 2013 silber turbo kit with the bully dog controller. I bought the kit with plans of puting it on the iqr. It will require minor mods but im positive it will work. The issue im thinking i will have is that its still a short track 121x1.75 and I may never hook up, this sled will be used in the flatlands of saskatchewan at 2500 elevation. Could anyone point me in the right direction as to what clutching combo i should try? The kit came with the clutching for the pro but im not sure if itll work best with the 121.

Thanks!