Cam design limitations

"It certainly does nothing to reduce the temperature of the intake charge ("It uses exhaust gases, directly out of the exh port, to COOL the intake charge.") before it gets into the combustion chamber. It is, after all, fresh (HOT) exhaust gas..."

You're right Bill. If you note tho you cut off where I said "and chamber". My Neon's EGR port (and back in '73 the floor jets) are in the plenum of the intake, which was why i mentioned the intake charge. It is inaccurate and you're right. But the ultimate end goal is reducing the chamber temps. My point was to note that it was much cooler than the flame front and combustion temps inside the chamber. I mentioned it because Stroker was saying he believes exhaust gases are still increasing in temp (generating heat) when traveling out of the chamber and port and I believe that to be incorrect.
Another point of fact, perhaps a better example, are the thermal barrier coatings that can be applied to the piston, chamber, port, and interior of the manifolding/header are all designed to limit the heat dissipation from the exh gasses and retain that energy with the result of keeping gas velocity in the port higher. The tuner crowd uses these fairly regularly.

I understand your approach is have fun. You asked how I would do it... lol. For me, I'm at the point that it's more hassle to do things the way you are. I don't have the time, money, or patience to "do over". That's why my '65 has the 170 in it, when I have all the V8 stuff, plus engines sitting there too. I just want to get in, turn a key, and drive it. Maybe after I retire. If I can ever retire...lol.