For sale is used C13 (KCB) about 750,000miles. Was rebuilt around 700,000 miles ran 2 seasons began small tick so shut truck off took oil filter off and then pan bolt laying in pan, main bolt broke and bearings 2&4 spun. Went to put bearings in 2 was little tight so we decided buy used engine rebuild this 1, but now taking up space, also comes with bunch parts some good, new, just had swap off motor to make it fit