^yes, if you are going to bolt it on, get the K start kit. Gila is out of the question if you are unsure about whether it requires you to rebuild (not trying to be a dick...but it requires rebuild, adding material to the case, and boring/milling it to accept the large transfer ports). If I were you, I'd bolt on the K-star or try to case match it without splitting the case (use the search function and you will find a thread showing you how to use playdough to do it). Good luck.