cylinder head and cylinder block used for the Cummins, Caterpillar, Detroid, GM, etc Engine long block and short block(cylinder block): Cummins: 6BT, 6CTA, ^BT, 6BTA, 6BTAA, 4BT, Mitsubishi: 4G64, 4G54 ... , cylinder heads): 6ct, 6bt, 6bta, 6btaa, 4bt.Caterpillar: 3208,3304 pc, 3306 pc, 3306 di, 34083406di, 769b (engine 9m3677, p/n: 9s5545) (cylinder block ...