caterpillar  cylinder head  3304/8     6I2378    

caterpillar  cylinder head  3304PC    8N1188   7N8574 with valve

caterpillar  cylinder head  3306PC    8N1187   6N8103 with valve

caterpillar  cylinder head  3306DI     8N6796    7N8876 with valve

caterpillar  cylinder head  3304DI     1N4304    7N8874 with valve

caterpillar  engine block  3066/S6K/S6KT     5I7776/1838230/2128566

caterpillar  engine block  3304          1N3574/7N5454

caterpillar  engine block  3306          1N3576/4P0623

cummins   cylinder block 4BT3.9      3903920

cummins   cylinder block  6BT5.9     39.3797

cummins   cylinder block  6CT8.3     3939313    one-thermostat

cummins   cylinder block  6CT8.3     3971411    two-thermostat