NORM P - Since it sounds like all your damage to Your K301 is on the block & crankshaft You could use a K301 from another make of tractor by reusing your oil pan. CC did have a kinda "Special" crankshaft but they're available used also for rather cheap. Also a K321 is a straight drop-in swap. FWIW the K341 is also but They're BIG MONEY with the Pullers.