Call it whatever you want, I have used a Phillips head socket on the factory FE cam thrust plate for close to 50 years without issues, so I have no reason to change what works for me. As for "Pozi Drive", every FE cam thrust plate bolt that I have ever removed, installed, or looked at, had just 4 large slots, just like a Phillips, can not say that I have ever noticed 4 "extra" tiny slots, as in the Pozi Drive illustration that you posted. Or have any idea what those 4 extra, small slots are intended to do.
As for the thrust plates themselves, I have never found the need to use anything other than the original Ford plates, and again, never an issue in nearly 50 years.
Well... respectfully,
I'm not calling it whatever I want.
I'm calling it what it is.
If you can't see the "hash marks" on the screw, maybe you need new glasses?
Here's a fuzzy out of focus shot of a genuine Ford cam retainer screw.
Even out of focus I can see the hash marks that denote a Pozidriv screw.
The 4 extra slots are simply identifying marks that tell you it’s a Pozidriv screw, and not a Phillips.
