So, I wouldn't have to cut the shaft for the OS? So. I would just put the flywheel, collet, cb, and clutch shoes on from the stock engine? And I would be good to go wit the OS .18 CV-RX on a Firestorm? (Does anyone else other than carpet aka daniel know for sure). And will the stock exhaust header work on the os? If not, can someone give me a link on tower to one that will work wit the stock pipe and the os .18 cvrx? Thanks.