Links to ID exhaust manifolds

[TRIPLE-GREEN]

Hello,
   I just ordered my exhaust from TTI. Trouble is they need a casting number for the exhaust manifolds. As far as I can see I cannot fine one. I went around both sides and could not located any casting numbers. I am worried they are not stock. As I assume there would be a number on the out side in clear site. NO?

Any help would be great. This is a stock 73 challenger with a 318. If you need I can post photo's later tonight!!

THANKS FOR YOUR HELP!!

[TRIPLE-GREEN]

 

[Bullitt-]

I don't know what to tell you... #s are cast in all OE manifolds....  Here is a list of them although I've heard there are some errors.
http://www.mymopar.com/index.php?pid=70

[TRIPLE-GREEN]

Thanks BULLITT- 
They said I can send a pic of each side. So it worked out!! Thanks!!