340 spacer plate

I am restoring a 69 Barracuda, I bought it with the engine and trans in pieces.
I have now rebuilt the engine and the 4 sod trans, about to put the 2 together but need to know. Is there supposed to be a spacer plate between the engine and trans?
I did not get one with the car but just seems as though there should be one.
If it is supposed to have one, any suggestions on where to find one?
Thanks in advance