I remember that post. I’m pretty sure the mopar performance catalog listed them as diamond cylinder heads. I know of only 2 other people that have another set of these heads and I don’t think they have near the work mine has. When I bought this engine back in 07 or 08 from vignonia it was ran in SS/AS in his duster, and he bought it from Kent Ritter. That’s what he told me. I will say one thing, my engine is a one off piece and a lot of trick stuff was done to it. When I bought it I put it on the dyno and it made 860@8300 and 598ftlbs@5800. I have since made a few upgrades while I freshened it up and I hope to hit the 900 mark. Great story by the way.