Looking for JUNK 426 Hemi Heads

I had a few ideas back when I was running an iron headed fueler that I'd like to revisit, and the only way to do that is with some scrap to grind and weld on. In short, I believe that in a limited pump class, like N/TF or F/C, that the ideal way to prevent over scavenging and leave a little more fuel in the chamber to be burned, is by using the stock droop style exhaust port. Also curious about building quench dams along the perimeter of the chambers to clean up some of the dead areas.
Any other questions?