I was digging through my father-in-laws old snowmobile stuff and found a box that had old cylinders with pistons in them and new base gaskets. there are three of them and one says 440 on it. I know that Arctic had a three cylinder 440 in the 70's. If anyone is interested and can help me identify them let me know. they seem in good shape. I seem to remember him saying that he had a rebuild kit but bought a new sled instead. Call 208-589-8882 Kim