It's the same size and looks like the same one I just put in my 67 Bird. I got mine from Year One and paid $100 more.
I'm not sure if the Camero and Firebird use the same mounts but it sure looks like it. I can't think of any reason why it wouldn't work but does an external trans cooler replace the built in or is it made to work with it? I would be afraid of getting the trans to hot.