The Hercules parts book shows the gas and diesels coming with sleeves or without sleeves. It was optional for both gas and diesel. The book shows DD versions in B,K,L,H,O,I,J,M,N,A,and C. Rod bearings show as just one # for all - 43081B and they come in standard, ..020" under and .040" under. Piston pin bushing is # 140121A. Main bearings differ by engine model. Diesel DD130, 149, 169, 173, 198, 226, 260, 298, and 339 all take 285102B for front, rear and intermediate. Thrust bearing for diesel DD130, 149, 169, 173, 198, 226, 260, 298, and 339 is # 285110B. All mains available in standard, .020" under and .040" under. Some are copper-lead and some are tin.