engine number location 318 please ?

So I have a 66 Barracuda, it has had a tough life,
It was imported here into Australia and I bought it 20 years ago.

Someone robbed most of the formula S gear off it and I have finally got it mostly all back, thanks mainly to Ebay and FABO sellers.

So it's 273 is long gone and it was fitted with (I was told) a 68 Barracuda 318.


My question is, can someone please tell me where they hid the engine number on those 318's ?
I will need that as part of my roadworthy check.

I have looked but it must be behind something, or I am blind.:rolleyes:

As always, appreciate the help.
Gary