318 Poly heads and stuff

I get you, I think the poly architecture would have been great if they would have ever developed it. Look at the other 'poly' (canted valve) head designs in the other 2 of big 3 and it's usually their highest performance engine (unless it was a hemi).
I think the most modern Poly would be the +09 4.7L Chrysler head for reference. Resize that to fit 6.4L hemi ports and I think you would have a winner for the A architecture.