Way to check if 2400 is original motor

[darkgrace]

My boss just bought this car and brought it into our body shop. So I have to do all the research on it. Love these cars we have now had two in the shop. Boss used to rebuild z and 510's 20 years ago. Any way is there any way for me to figure out if the motor in our car is original. I looked all over the motor but cannot seem to find amy numbers. Is there a tag on the motor that i am not seeing? Thanks for any help you can give me.

[dhoneycutt]

The engine number on the strut tower ID plate should match the engine number stamped on the block right after the L24-. It is stamped on the right side near the oil filter

[olzed]

Just above the starter motor.

[5thhorsemann]

On the flat boss below the head casting.

[Bonzi Lon]

Between cylinder #5 & 6.

Bonzi Lon

[240260280z]