fh721d crank sleeve question

i picked up a john deere 757 this winter with blown engine fh721d. pulled it all apart and ordered all new gaskets crank and pistons (motor popped both connecting rods and crank got pretty scared up) went to start assembly and notice where the crank goes in the block the sleeve is grooved up like a car rotor rest of block is in great condition is that sleeve replaceable or am i wasting time
thanks for any help