No, I'm pretty sure the ambasador should be a rear outlet, with the removable side gaurd for edge cutting.
I think the rear chute is just obscured bu the engine in that pictue, you can make out the slightest difference in height if you liik along the edge of the engine.
That Corvette migh well be one of the early plastic catchers too, Loking at the stubs, it could be either way, what catcher do you have that you were thinking Bob?