to see it it's a nikasil
The composition of the engine can be found by checking the serial number stamped into the engine block:
M60B30:
1 725 970 - Nikasil
1 741 212 - Nikasil
1 745 871 - Alusil
M60B40:
1 725 963 - Nikasil
1 742 998 - Nikasil
1 745 872 - Alusil