My 71 M code was as original as it gets under the hood when I bought it. No A/C or anything else for that matter and it HAD the "deflector" or whatever it's called, so I would guess that all the V8's in 71 had them, so if they were getting deleted on some later models and not others, was it penny pinching on Ford's part? That or these parts just got tossed when rads were replaced, not put back on. What else????
The pic is from when I first stripped the front end for engine rebuilding in 2012. What you see is factory. Little work was ever done under the hood. Oh! for the eagle eyed, the carb was replaced with a Holley, but I do have the original!