EQ318B Magnum heads discontinued ?

On the 1st set of EQ heads I got, and put on a83 D250's original 318 along with a performer intakes(not air gap style) and performer carb, hooker super comp headers and a stock replacement Melling cam for a 70s 360-2 bbl engine and was amazed at how much it woke that engine up. I did use the then available MP "thin" head gaskets, like 0.028" thick as I remember